Лаба 1 сдана.

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Entities/Agent.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TradeAndProcurementEnterprice.Entities.Enums;
+
+namespace TradeAndProcurementEnterprice.Entities;
+
+public class Agent
+{
+    public int Id { get; private set; }
+
+    public string Name { get; private set; } = string.Empty;
+
+    public Qualification Qualification { get; private set; }
+
+    public Category Category { get; private set; }
+
+    public static Agent CreateEntity(int id, string name, Qualification qualification, Category category)
+    {
+        return new Agent
+        {
+            Id = id,
+            Name = name ?? string.Empty,
+            Qualification = qualification,
+            Category = category
+        };
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Entities/Contract.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace TradeAndProcurementEnterprice.Entities;
+
+public class Contract
+{
+    public int ContractID { get; private set; }
+
+    public DateTime SaleTime { get; private set; }
+
+    public int PurchasingCompanyID { get; private set; }
+
+    public int AgentsID { get; private set; }
+
+    public IEnumerable<ProductSales> ProductSales { get; private set; } = [];
+
+    public static Contract CreateOperation(int contractID, int purchasingCompanyID, int agentsID, IEnumerable<ProductSales> productSales)
+    {
+        return new Contract
+        {
+            ContractID = contractID,
+            SaleTime = DateTime.Now,
+            PurchasingCompanyID = purchasingCompanyID,
+            AgentsID = agentsID,
+            ProductSales = productSales
+        };
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Entities/DelegateToAgents.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace TradeAndProcurementEnterprice.Entities;
+
+public class DelegateToAgents
+{
+    public int Id { get; private set; }
+    public int ProductArticle { get; private set; }
+
+    public int AgentsID { get; private set; }
+
+    public int Quantity { get; private set; }
+
+    public DateTime Date { get; private set; }
+
+    public static DelegateToAgents CreateOperation(int id, int productArticle, int agentsID, int quantity)
+    {
+        return new DelegateToAgents
+        {
+            Id = id,
+            ProductArticle = productArticle,
+            AgentsID = agentsID,
+            Date = DateTime.Now,
+            Quantity = quantity
+        };
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Entities/Enums/Category.cs

@@ -0,0 +1,18 @@
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace TradeAndProcurementEnterprice.Entities.Enums;
+
+[Flags]
+public enum Category
+{
+    None = 0,
+    Dairy = 1,
+    Groceries = 2,
+    Frozen = 4,
+    Other = 8
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Entities/Enums/Qualification.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace TradeAndProcurementEnterprice.Entities.Enums;
+
+public enum Qualification
+{
+    None = 0,
+    Junior = 1,
+    Middle = 2,
+    Senior = 3
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Entities/Enums/Unit.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace TradeAndProcurementEnterprice.Entities.Enums;
+
+public enum Unit
+{
+    Kilogram = 0,
+    Piece = 1,
+    Liter = 2
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Entities/Product.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TradeAndProcurementEnterprice.Entities.Enums;
+
+namespace TradeAndProcurementEnterprice.Entities;
+
+public class Product
+{
+    public int Article { get; private set; }
+
+    public string Nomenclature { get; private set; } = string.Empty;
+
+    public decimal SellingPrice { get; private set; }
+
+    public Unit Unit { get; private set; }
+
+    public Category Category { get; private set; }
+
+    public int InventoryQuantity { get; private set; }
+
+    public static Product CreateEntity(int article, string nomenclature, decimal sellingPrice, Unit unit, 
+        Category category, int inventoryQuantity)
+    {
+        return new Product
+        {
+            Article = article,
+            Nomenclature = nomenclature ?? string.Empty,
+            SellingPrice = sellingPrice,
+            Unit = unit,
+            Category = category,
+            InventoryQuantity = inventoryQuantity
+        };
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Entities/ProductSales.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace TradeAndProcurementEnterprice.Entities;
+
+public class ProductSales
+{
+    public int Id { get; private set; }
+
+    public int ProductArticle { get; private set; }
+
+    public int ProductQuantity { get; private set; }
+
+    public static ProductSales CreateElement(int id, int prodictArticle, int productQuantity)
+    {
+        return new ProductSales
+        {
+            Id = id,
+            ProductArticle = prodictArticle,
+            ProductQuantity = productQuantity
+        };
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Entities/PurchasingCompany.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace TradeAndProcurementEnterprice.Entities;
+
+public class PurchasingCompany
+{
+    public int Id { get; private set; }
+
+    public string Name { get; private set; } = string.Empty;
+
+    public static PurchasingCompany CreateEntity(int id, string name)
+    {
+        return new PurchasingCompany
+        {
+            Id = id,
+            Name = name
+        };
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Form1.Designer.cs

@@ -1,39 +0,0 @@
-namespace TradeAndProcurementEnterprice
-{
-    partial class Form1
-    {
-        /// <summary>
-        ///  Required designer variable.
-        /// </summary>
-        private System.ComponentModel.IContainer components = null;
-
-        /// <summary>
-        ///  Clean up any resources being used.
-        /// </summary>
-        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
-        protected override void Dispose(bool disposing)
-        {
-            if (disposing && (components != null))
-            {
-                components.Dispose();
-            }
-            base.Dispose(disposing);
-        }
-
-        #region Windows Form Designer generated code
-
-        /// <summary>
-        ///  Required method for Designer support - do not modify
-        ///  the contents of this method with the code editor.
-        /// </summary>
-        private void InitializeComponent()
-        {
-            this.components = new System.ComponentModel.Container();
-            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
-            this.ClientSize = new System.Drawing.Size(800, 450);
-            this.Text = "Form1";
-        }
-
-        #endregion
-    }
-}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Form1.cs

@@ -1,10 +0,0 @@
-namespace TradeAndProcurementEnterprice
-{
-    public partial class Form1 : Form
-    {
-        public Form1()
-        {
-            InitializeComponent();
-        }
-    }
-}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/FormEnterprice.Designer.cs

@@ -0,0 +1,140 @@
+namespace TradeAndProcurementEnterprice
+{
+    partial class FormEnterprice
+    {
+        /// <summary>
+        ///  Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        ///  Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        ///  Required method for Designer support - do not modify
+        ///  the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            menuStrip1 = new MenuStrip();
+            catalogToolStripMenuItem = new ToolStripMenuItem();
+            agentsToolStripMenuItem = new ToolStripMenuItem();
+            nomenclatureToolStripMenuItem = new ToolStripMenuItem();
+            purchasingCompanyToolStripMenuItem = new ToolStripMenuItem();
+            operationToolStripMenuItem = new ToolStripMenuItem();
+            contractsToolStripMenuItem1 = new ToolStripMenuItem();
+            delegateToAgentsToolStripMenuItem = new ToolStripMenuItem();
+            reportToolStripMenuItem = new ToolStripMenuItem();
+            menuStrip1.SuspendLayout();
+            SuspendLayout();
+            // 
+            // menuStrip1
+            // 
+            menuStrip1.ImageScalingSize = new Size(32, 32);
+            menuStrip1.Items.AddRange(new ToolStripItem[] { catalogToolStripMenuItem, operationToolStripMenuItem, reportToolStripMenuItem });
+            menuStrip1.Location = new Point(0, 0);
+            menuStrip1.Name = "menuStrip1";
+            menuStrip1.Padding = new Padding(3, 1, 0, 1);
+            menuStrip1.Size = new Size(650, 24);
+            menuStrip1.TabIndex = 0;
+            menuStrip1.Text = "menuStrip1";
+            // 
+            // catalogToolStripMenuItem
+            // 
+            catalogToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { agentsToolStripMenuItem, nomenclatureToolStripMenuItem, purchasingCompanyToolStripMenuItem });
+            catalogToolStripMenuItem.Name = "catalogToolStripMenuItem";
+            catalogToolStripMenuItem.Size = new Size(94, 22);
+            catalogToolStripMenuItem.Text = "Справочники";
+            // 
+            // agentsToolStripMenuItem
+            // 
+            agentsToolStripMenuItem.Name = "agentsToolStripMenuItem";
+            agentsToolStripMenuItem.Size = new Size(195, 22);
+            agentsToolStripMenuItem.Text = "Агенты-реализаторы";
+            agentsToolStripMenuItem.Click += AgentsToolStripMenuItem_Click;
+            // 
+            // nomenclatureToolStripMenuItem
+            // 
+            nomenclatureToolStripMenuItem.Name = "nomenclatureToolStripMenuItem";
+            nomenclatureToolStripMenuItem.Size = new Size(195, 22);
+            nomenclatureToolStripMenuItem.Text = "Номенклатура";
+            nomenclatureToolStripMenuItem.Click += NomenclatureToolStripMenuItem_Click;
+            // 
+            // purchasingCompanyToolStripMenuItem
+            // 
+            purchasingCompanyToolStripMenuItem.Name = "purchasingCompanyToolStripMenuItem";
+            purchasingCompanyToolStripMenuItem.Size = new Size(195, 22);
+            purchasingCompanyToolStripMenuItem.Text = "Компании закупщики";
+            purchasingCompanyToolStripMenuItem.Click += PurchasingCompanyToolStripMenuItem_Click;
+            // 
+            // operationToolStripMenuItem
+            // 
+            operationToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { contractsToolStripMenuItem1, delegateToAgentsToolStripMenuItem });
+            operationToolStripMenuItem.Name = "operationToolStripMenuItem";
+            operationToolStripMenuItem.Size = new Size(75, 22);
+            operationToolStripMenuItem.Text = "Операции";
+            // 
+            // contractsToolStripMenuItem1
+            // 
+            contractsToolStripMenuItem1.Name = "contractsToolStripMenuItem1";
+            contractsToolStripMenuItem1.Size = new Size(174, 22);
+            contractsToolStripMenuItem1.Text = "Продажи";
+            contractsToolStripMenuItem1.Click += ContractsToolStripMenuItem1_Click;
+            // 
+            // delegateToAgentsToolStripMenuItem
+            // 
+            delegateToAgentsToolStripMenuItem.Name = "delegateToAgentsToolStripMenuItem";
+            delegateToAgentsToolStripMenuItem.Size = new Size(174, 22);
+            delegateToAgentsToolStripMenuItem.Text = "Передача агентам";
+            delegateToAgentsToolStripMenuItem.Click += DelegateToAgentsToolStripMenuItem_Click;
+            // 
+            // reportToolStripMenuItem
+            // 
+            reportToolStripMenuItem.Name = "reportToolStripMenuItem";
+            reportToolStripMenuItem.Size = new Size(60, 22);
+            reportToolStripMenuItem.Text = "Отчёты";
+            // 
+            // FormEnterprice
+            // 
+            AutoScaleDimensions = new SizeF(7F, 15F);
+            AutoScaleMode = AutoScaleMode.Font;
+            BackgroundImage = Properties.Resources.photo_2024_12_03_21_34_38;
+            BackgroundImageLayout = ImageLayout.Stretch;
+            ClientSize = new Size(650, 339);
+            Controls.Add(menuStrip1);
+            MainMenuStrip = menuStrip1;
+            Margin = new Padding(2, 1, 2, 1);
+            Name = "FormEnterprice";
+            StartPosition = FormStartPosition.CenterScreen;
+            Text = "Торгово закупочное предприятие";
+            menuStrip1.ResumeLayout(false);
+            menuStrip1.PerformLayout();
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+
+        private MenuStrip menuStrip1;
+        private ToolStripMenuItem catalogToolStripMenuItem;
+        private ToolStripMenuItem agentsToolStripMenuItem;
+        private ToolStripMenuItem nomenclatureToolStripMenuItem;
+        private ToolStripMenuItem operationToolStripMenuItem;
+        private ToolStripMenuItem reportToolStripMenuItem;
+        private ToolStripMenuItem purchasingCompanyToolStripMenuItem;
+        private ToolStripMenuItem contractsToolStripMenuItem1;
+        private ToolStripMenuItem delegateToAgentsToolStripMenuItem;
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/FormEnterprice.cs

@@ -0,0 +1,82 @@
+using TradeAndProcurementEnterprice.Forms;
+using Unity;
+
+namespace TradeAndProcurementEnterprice
+{
+    public partial class FormEnterprice : Form
+    {
+        private readonly IUnityContainer _container;
+
+        public FormEnterprice(IUnityContainer container)
+        {
+            InitializeComponent();
+            _container = container ??
+                throw new ArgumentNullException(nameof(container));
+        }
+
+        private void AgentsToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                _container.Resolve<FormAgents>().ShowDialog();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Îøèáêà ïðè çàãðóçêå!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void NomenclatureToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                _container.Resolve<FormProducts>().ShowDialog();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Îøèáêà ïðè çàãðóçêå!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void PurchasingCompanyToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                _container.Resolve<FormPurchasingCompanies>().ShowDialog();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Îøèáêà ïðè çàãðóçêå!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void ContractsToolStripMenuItem1_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                _container.Resolve<FormContracts>().ShowDialog();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Îøèáêà ïðè çàãðóçêå!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void DelegateToAgentsToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                _container.Resolve<FormDelegatesToAgents>().ShowDialog();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Îøèáêà ïðè çàãðóçêå!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void FormEnterprice_Load(object sender, EventArgs e)
+        {
+
+        }
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/FormEnterprice.resx

@@ -0,0 +1,123 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <metadata name="menuStrip1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+    <value>17, 17</value>
+  </metadata>
+</root>

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormAgent.Designer.cs

@@ -0,0 +1,158 @@
+namespace TradeAndProcurementEnterprice.Forms
+{
+    partial class FormAgent
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            buttonCancel = new Button();
+            buttonSave = new Button();
+            comboBoxQualification = new ComboBox();
+            textBoxName = new TextBox();
+            labelCategory = new Label();
+            labelQualification = new Label();
+            labelName = new Label();
+            checkedListBoxCategory = new CheckedListBox();
+            SuspendLayout();
+            // 
+            // buttonCancel
+            // 
+            buttonCancel.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;
+            buttonCancel.Location = new Point(280, 412);
+            buttonCancel.Margin = new Padding(6, 6, 6, 6);
+            buttonCancel.Name = "buttonCancel";
+            buttonCancel.Size = new Size(156, 49);
+            buttonCancel.TabIndex = 16;
+            buttonCancel.Text = "Отмена";
+            buttonCancel.UseVisualStyleBackColor = true;
+            buttonCancel.Click += ButtonCancel_Click;
+            // 
+            // buttonSave
+            // 
+            buttonSave.Anchor = AnchorStyles.Bottom | AnchorStyles.Left;
+            buttonSave.Location = new Point(80, 412);
+            buttonSave.Margin = new Padding(6, 6, 6, 6);
+            buttonSave.Name = "buttonSave";
+            buttonSave.Size = new Size(156, 49);
+            buttonSave.TabIndex = 17;
+            buttonSave.Text = "Сохранить";
+            buttonSave.UseVisualStyleBackColor = true;
+            buttonSave.Click += ButtonSave_Click;
+            // 
+            // comboBoxQualification
+            // 
+            comboBoxQualification.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
+            comboBoxQualification.DropDownStyle = ComboBoxStyle.DropDownList;
+            comboBoxQualification.FormattingEnabled = true;
+            comboBoxQualification.Location = new Point(217, 124);
+            comboBoxQualification.Margin = new Padding(6, 6, 6, 6);
+            comboBoxQualification.Name = "comboBoxQualification";
+            comboBoxQualification.Size = new Size(273, 40);
+            comboBoxQualification.TabIndex = 14;
+            // 
+            // textBoxName
+            // 
+            textBoxName.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
+            textBoxName.Location = new Point(217, 38);
+            textBoxName.Margin = new Padding(6, 6, 6, 6);
+            textBoxName.Name = "textBoxName";
+            textBoxName.Size = new Size(273, 39);
+            textBoxName.TabIndex = 11;
+            // 
+            // labelCategory
+            // 
+            labelCategory.AutoSize = true;
+            labelCategory.Location = new Point(39, 220);
+            labelCategory.Margin = new Padding(6, 0, 6, 0);
+            labelCategory.Name = "labelCategory";
+            labelCategory.Size = new Size(126, 32);
+            labelCategory.TabIndex = 7;
+            labelCategory.Text = "Категория";
+            // 
+            // labelQualification
+            // 
+            labelQualification.AutoSize = true;
+            labelQualification.Location = new Point(43, 130);
+            labelQualification.Margin = new Padding(6, 0, 6, 0);
+            labelQualification.Name = "labelQualification";
+            labelQualification.Size = new Size(174, 32);
+            labelQualification.TabIndex = 8;
+            labelQualification.Text = "Квалификация";
+            // 
+            // labelName
+            // 
+            labelName.AutoSize = true;
+            labelName.Location = new Point(39, 53);
+            labelName.Margin = new Padding(6, 0, 6, 0);
+            labelName.Name = "labelName";
+            labelName.Size = new Size(67, 32);
+            labelName.TabIndex = 10;
+            labelName.Text = "ФИО";
+            // 
+            // checkedListBoxCategory
+            // 
+            checkedListBoxCategory.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
+            checkedListBoxCategory.FormattingEnabled = true;
+            checkedListBoxCategory.Location = new Point(217, 211);
+            checkedListBoxCategory.Margin = new Padding(6, 6, 6, 6);
+            checkedListBoxCategory.Name = "checkedListBoxCategory";
+            checkedListBoxCategory.Size = new Size(273, 148);
+            checkedListBoxCategory.TabIndex = 18;
+            // 
+            // FormAgent
+            // 
+            AutoScaleDimensions = new SizeF(13F, 32F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(549, 504);
+            Controls.Add(checkedListBoxCategory);
+            Controls.Add(buttonCancel);
+            Controls.Add(buttonSave);
+            Controls.Add(comboBoxQualification);
+            Controls.Add(textBoxName);
+            Controls.Add(labelCategory);
+            Controls.Add(labelQualification);
+            Controls.Add(labelName);
+            Margin = new Padding(6, 6, 6, 6);
+            MinimumSize = new Size(575, 575);
+            Name = "FormAgent";
+            StartPosition = FormStartPosition.CenterParent;
+            Text = "Агент-реализатор";
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+
+        private Button buttonCancel;
+        private Button buttonSave;
+        private ComboBox comboBoxQualification;
+        private TextBox textBoxName;
+        private Label labelCategory;
+        private Label labelQualification;
+        private Label labelName;
+        private CheckedListBox checkedListBoxCategory;
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormAgent.cs

@@ -0,0 +1,108 @@
+using Microsoft.VisualBasic.FileIO;
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using TradeAndProcurementEnterprice.Entities;
+using TradeAndProcurementEnterprice.Entities.Enums;
+using TradeAndProcurementEnterprice.Repositories;
+
+namespace TradeAndProcurementEnterprice.Forms
+{
+
+    public partial class FormAgent : Form
+    {
+
+    private readonly IAgentsRepository _agentsRepository;
+
+    private int? _agentsId;
+
+    public int Id
+    {
+        set
+        {
+            try
+            {
+                var agent = _agentsRepository.ReadAgentByID(value); 
+                if (agent == null) 
+                { 
+                    throw new InvalidDataException(nameof(agent)); 
+                }
+                
+                textBoxName.Text = agent.Name; 
+                comboBoxQualification.SelectedItem = agent.Qualification; foreach (Category elem in Enum.GetValues(typeof(Category)))
+                {
+                    if ((elem & agent.Category) != 0)
+                    {
+                        checkedListBoxCategory.SetItemChecked(checkedListBoxCategory.Items.IndexOf(elem), true);
+                    }
+                }
+                _agentsId = value;
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при получении данных!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+        }
+    }
+        public FormAgent(IAgentsRepository agentsRepository)
+        {
+            InitializeComponent();
+            _agentsRepository = agentsRepository ??
+                throw new ArgumentNullException(nameof(agentsRepository));
+
+            comboBoxQualification.DataSource = Enum.GetValues(typeof(Qualification));
+
+            foreach (var elem in Enum.GetValues(typeof(Category)))
+            {
+                checkedListBoxCategory.Items.Add(elem);
+            }
+        }
+
+        private void ButtonSave_Click(object sender, EventArgs e)
+        {
+            try 
+            {
+                if (string.IsNullOrWhiteSpace(textBoxName.Text) || checkedListBoxCategory.CheckedItems.Count == 0 || comboBoxQualification.SelectedIndex < 1) 
+                { 
+                    throw new Exception("Имеются незаполненные поля!"); 
+                } 
+                
+                if (_agentsId.HasValue) 
+                { 
+                    _agentsRepository.UpdateAgent(CreateAgent(_agentsId.Value)); 
+                }
+                else 
+                { 
+                    _agentsRepository.CreateAgent(CreateAgent(0)); 
+                }
+                
+                Close(); 
+            } 
+            catch (Exception ex) 
+            { 
+                MessageBox.Show(ex.Message, "Ошибка при сохранении!", MessageBoxButtons.OK, MessageBoxIcon.Error); 
+            }
+        }
+
+        private void ButtonCancel_Click(object sender, EventArgs e) => Close();
+
+        private Agent CreateAgent(int id)
+        {
+            Category category = Category.None;
+            foreach (var elem in checkedListBoxCategory.CheckedItems)
+            {
+                category |= (Category)elem;
+            }
+
+            return Agent.CreateEntity(id, textBoxName.Text, (Qualification)comboBoxQualification.SelectedItem,
+                category);
+        }
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormAgents.Designer.cs

@@ -0,0 +1,134 @@
+namespace TradeAndProcurementEnterprice.Forms
+{
+    partial class FormAgents
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            panel1 = new Panel();
+            buttonDel = new Button();
+            buttonEdit = new Button();
+            buttonAdd = new Button();
+            dataGridViewData = new DataGridView();
+            panel1.SuspendLayout();
+            ((System.ComponentModel.ISupportInitialize)dataGridViewData).BeginInit();
+            SuspendLayout();
+            // 
+            // panel1
+            // 
+            panel1.Controls.Add(buttonDel);
+            panel1.Controls.Add(buttonEdit);
+            panel1.Controls.Add(buttonAdd);
+            panel1.Dock = DockStyle.Right;
+            panel1.Location = new Point(1196, 0);
+            panel1.Margin = new Padding(6, 6, 6, 6);
+            panel1.Name = "panel1";
+            panel1.Size = new Size(178, 929);
+            panel1.TabIndex = 0;
+            // 
+            // buttonDel
+            // 
+            buttonDel.BackgroundImage = Properties.Resources.remove;
+            buttonDel.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonDel.Location = new Point(32, 390);
+            buttonDel.Margin = new Padding(6, 6, 6, 6);
+            buttonDel.Name = "buttonDel";
+            buttonDel.Size = new Size(121, 139);
+            buttonDel.TabIndex = 3;
+            buttonDel.UseVisualStyleBackColor = true;
+            buttonDel.Click += ButtonDel_Click;
+            // 
+            // buttonEdit
+            // 
+            buttonEdit.BackgroundImage = Properties.Resources.edit;
+            buttonEdit.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonEdit.Location = new Point(32, 203);
+            buttonEdit.Margin = new Padding(6, 6, 6, 6);
+            buttonEdit.Name = "buttonEdit";
+            buttonEdit.Size = new Size(121, 139);
+            buttonEdit.TabIndex = 2;
+            buttonEdit.UseVisualStyleBackColor = true;
+            buttonEdit.Click += ButtonEdit_Click;
+            // 
+            // buttonAdd
+            // 
+            buttonAdd.BackgroundImage = Properties.Resources.add;
+            buttonAdd.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonAdd.Location = new Point(32, 26);
+            buttonAdd.Margin = new Padding(6, 6, 6, 6);
+            buttonAdd.Name = "buttonAdd";
+            buttonAdd.Size = new Size(121, 139);
+            buttonAdd.TabIndex = 1;
+            buttonAdd.UseVisualStyleBackColor = true;
+            buttonAdd.Click += ButtonAdd_Click;
+            // 
+            // dataGridViewData
+            // 
+            dataGridViewData.AllowUserToAddRows = false;
+            dataGridViewData.AllowUserToDeleteRows = false;
+            dataGridViewData.AllowUserToResizeColumns = false;
+            dataGridViewData.AllowUserToResizeRows = false;
+            dataGridViewData.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
+            dataGridViewData.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            dataGridViewData.Dock = DockStyle.Fill;
+            dataGridViewData.Location = new Point(0, 0);
+            dataGridViewData.Margin = new Padding(6, 6, 6, 6);
+            dataGridViewData.MultiSelect = false;
+            dataGridViewData.Name = "dataGridViewData";
+            dataGridViewData.ReadOnly = true;
+            dataGridViewData.RowHeadersVisible = false;
+            dataGridViewData.RowHeadersWidth = 82;
+            dataGridViewData.RowTemplate.Height = 25;
+            dataGridViewData.Size = new Size(1196, 929);
+            dataGridViewData.TabIndex = 1;
+            // 
+            // FormAgents
+            // 
+            AutoScaleDimensions = new SizeF(13F, 32F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(1374, 929);
+            Controls.Add(dataGridViewData);
+            Controls.Add(panel1);
+            Margin = new Padding(6, 6, 6, 6);
+            MinimumSize = new Size(1000, 630);
+            Name = "FormAgents";
+            StartPosition = FormStartPosition.CenterParent;
+            Text = "Агенты-реализаторы";
+            Load += FormAgents_Load;
+            panel1.ResumeLayout(false);
+            ((System.ComponentModel.ISupportInitialize)dataGridViewData).EndInit();
+            ResumeLayout(false);
+        }
+
+        #endregion
+
+        private Panel panel1;
+        private Button buttonAdd;
+        private Button buttonDel;
+        private Button buttonEdit;
+        private DataGridView dataGridViewData;
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormAgents.cs

@@ -0,0 +1,115 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using System.Xml.Linq;
+using TradeAndProcurementEnterprice.Repositories;
+using TradeAndProcurementEnterprice.Repositories.Implementations;
+using Unity;
+
+namespace TradeAndProcurementEnterprice.Forms
+{
+    public partial class FormAgents : Form
+    {
+        private readonly IUnityContainer _container;
+
+        private readonly IAgentsRepository _agentsRepository;
+
+        public FormAgents(IUnityContainer container, IAgentsRepository agentsRepository)
+        {
+            InitializeComponent();
+            _container = container ??
+                throw new ArgumentNullException(nameof(container));
+            _agentsRepository = agentsRepository ??
+                throw new ArgumentNullException(nameof(agentsRepository));
+        }
+
+        private void FormAgents_Load(object sender, EventArgs e)
+        {
+            try
+            {
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при загрузке!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void ButtonAdd_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                _container.Resolve<FormAgent>().ShowDialog();
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при добавлении!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void ButtonEdit_Click(object sender, EventArgs e)
+        {
+            if (!TryGetIdFromSelectedRow(out var findId))
+            {
+                return;
+            }
+
+            try
+            {
+                var form = _container.Resolve<FormAgent>();
+                form.Id = findId;
+                form.ShowDialog();
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при изменении!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void ButtonDel_Click(object sender, EventArgs e)
+        {
+            if (!TryGetIdFromSelectedRow(out var findId))
+            {
+                return;
+            }
+
+            if (MessageBox.Show("Удалить запись?", "Удаление", MessageBoxButtons.YesNo) != DialogResult.Yes)
+            {
+                return;
+            }
+
+            try
+            {
+                _agentsRepository.DeleteAgent(findId);
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при удалении!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void LoadList() => dataGridViewData.DataSource = _agentsRepository.ReadAgents();
+
+        private bool TryGetIdFromSelectedRow(out int id)
+        {
+            id = 0;
+            if (dataGridViewData.SelectedRows.Count < 1)
+            {
+                MessageBox.Show("Нет выбранной записи!", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return false;
+            }
+
+            id = Convert.ToInt32(dataGridViewData.SelectedRows[0].Cells["Id"].Value);
+            return true;
+        }
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormAgents.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormContract.Designer.cs

@@ -0,0 +1,189 @@
+namespace TradeAndProcurementEnterprice.Forms
+{
+    partial class FormContract
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            buttonCancel = new Button();
+            buttonSave = new Button();
+            comboBoxPurchasingCompany = new ComboBox();
+            comboBoxAgent = new ComboBox();
+            labelAgent = new Label();
+            labelPurchatingCompany = new Label();
+            groupBox1 = new GroupBox();
+            dataGridViewProduct = new DataGridView();
+            ColumnProduct = new DataGridViewComboBoxColumn();
+            ColumnQuantity = new DataGridViewTextBoxColumn();
+            groupBox1.SuspendLayout();
+            ((System.ComponentModel.ISupportInitialize)dataGridViewProduct).BeginInit();
+            SuspendLayout();
+            // 
+            // buttonCancel
+            // 
+            buttonCancel.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;
+            buttonCancel.Location = new Point(292, 653);
+            buttonCancel.Margin = new Padding(6);
+            buttonCancel.Name = "buttonCancel";
+            buttonCancel.Size = new Size(156, 49);
+            buttonCancel.TabIndex = 32;
+            buttonCancel.Text = "Отмена";
+            buttonCancel.UseVisualStyleBackColor = true;
+            buttonCancel.Click += ButtonCancel_Click;
+            // 
+            // buttonSave
+            // 
+            buttonSave.Anchor = AnchorStyles.Bottom | AnchorStyles.Left;
+            buttonSave.Location = new Point(50, 653);
+            buttonSave.Margin = new Padding(6);
+            buttonSave.Name = "buttonSave";
+            buttonSave.Size = new Size(156, 49);
+            buttonSave.TabIndex = 33;
+            buttonSave.Text = "Сохранить";
+            buttonSave.UseVisualStyleBackColor = true;
+            buttonSave.Click += ButtonSave_Click;
+            // 
+            // comboBoxPurchasingCompany
+            // 
+            comboBoxPurchasingCompany.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
+            comboBoxPurchasingCompany.DropDownStyle = ComboBoxStyle.DropDownList;
+            comboBoxPurchasingCompany.FormattingEnabled = true;
+            comboBoxPurchasingCompany.Location = new Point(221, 34);
+            comboBoxPurchasingCompany.Margin = new Padding(6);
+            comboBoxPurchasingCompany.Name = "comboBoxPurchasingCompany";
+            comboBoxPurchasingCompany.Size = new Size(241, 40);
+            comboBoxPurchasingCompany.TabIndex = 29;
+            // 
+            // comboBoxAgent
+            // 
+            comboBoxAgent.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
+            comboBoxAgent.DropDownStyle = ComboBoxStyle.DropDownList;
+            comboBoxAgent.FormattingEnabled = true;
+            comboBoxAgent.Location = new Point(221, 126);
+            comboBoxAgent.Margin = new Padding(6);
+            comboBoxAgent.Name = "comboBoxAgent";
+            comboBoxAgent.Size = new Size(241, 40);
+            comboBoxAgent.TabIndex = 30;
+            // 
+            // labelAgent
+            // 
+            labelAgent.Location = new Point(39, 111);
+            labelAgent.Margin = new Padding(6, 0, 6, 0);
+            labelAgent.Name = "labelAgent";
+            labelAgent.Size = new Size(167, 77);
+            labelAgent.TabIndex = 27;
+            labelAgent.Text = "Агент-\r\nреализатор";
+            // 
+            // labelPurchatingCompany
+            // 
+            labelPurchatingCompany.Location = new Point(43, 23);
+            labelPurchatingCompany.Margin = new Padding(6, 0, 6, 0);
+            labelPurchatingCompany.Name = "labelPurchatingCompany";
+            labelPurchatingCompany.Size = new Size(163, 68);
+            labelPurchatingCompany.TabIndex = 28;
+            labelPurchatingCompany.Text = "Компания закупщик";
+            // 
+            // groupBox1
+            // 
+            groupBox1.Anchor = AnchorStyles.Top | AnchorStyles.Bottom | AnchorStyles.Left | AnchorStyles.Right;
+            groupBox1.Controls.Add(dataGridViewProduct);
+            groupBox1.Location = new Point(43, 218);
+            groupBox1.Margin = new Padding(6);
+            groupBox1.Name = "groupBox1";
+            groupBox1.Padding = new Padding(6);
+            groupBox1.Size = new Size(422, 422);
+            groupBox1.TabIndex = 34;
+            groupBox1.TabStop = false;
+            groupBox1.Text = "Продукт";
+            // 
+            // dataGridViewProduct
+            // 
+            dataGridViewProduct.AllowUserToResizeColumns = false;
+            dataGridViewProduct.AllowUserToResizeRows = false;
+            dataGridViewProduct.Anchor = AnchorStyles.Top | AnchorStyles.Bottom | AnchorStyles.Left | AnchorStyles.Right;
+            dataGridViewProduct.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            dataGridViewProduct.Columns.AddRange(new DataGridViewColumn[] { ColumnProduct, ColumnQuantity });
+            dataGridViewProduct.Location = new Point(6, 41);
+            dataGridViewProduct.Margin = new Padding(6);
+            dataGridViewProduct.MultiSelect = false;
+            dataGridViewProduct.Name = "dataGridViewProduct";
+            dataGridViewProduct.RowHeadersVisible = false;
+            dataGridViewProduct.RowHeadersWidth = 82;
+            dataGridViewProduct.RowTemplate.Height = 25;
+            dataGridViewProduct.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
+            dataGridViewProduct.Size = new Size(404, 375);
+            dataGridViewProduct.TabIndex = 0;
+            // 
+            // ColumnProduct
+            // 
+            ColumnProduct.HeaderText = "Наименование";
+            ColumnProduct.MinimumWidth = 10;
+            ColumnProduct.Name = "ColumnProduct";
+            ColumnProduct.Width = 200;
+            // 
+            // ColumnQuantity
+            // 
+            ColumnQuantity.HeaderText = "Количесво";
+            ColumnQuantity.MinimumWidth = 10;
+            ColumnQuantity.Name = "ColumnQuantity";
+            ColumnQuantity.Width = 200;
+            // 
+            // FormContract
+            // 
+            AutoScaleDimensions = new SizeF(13F, 32F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(497, 727);
+            Controls.Add(groupBox1);
+            Controls.Add(buttonCancel);
+            Controls.Add(buttonSave);
+            Controls.Add(comboBoxPurchasingCompany);
+            Controls.Add(comboBoxAgent);
+            Controls.Add(labelAgent);
+            Controls.Add(labelPurchatingCompany);
+            Margin = new Padding(6);
+            MinimumSize = new Size(480, 730);
+            Name = "FormContract";
+            StartPosition = FormStartPosition.CenterParent;
+            Text = "Контракт";
+            groupBox1.ResumeLayout(false);
+            ((System.ComponentModel.ISupportInitialize)dataGridViewProduct).EndInit();
+            ResumeLayout(false);
+        }
+
+        #endregion
+
+        private Button buttonCancel;
+        private Button buttonSave;
+        private ComboBox comboBoxPurchasingCompany;
+        private ComboBox comboBoxAgent;
+        private Label labelAgent;
+        private Label labelPurchatingCompany;
+        private GroupBox groupBox1;
+        private DataGridView dataGridViewProduct;
+        private DataGridViewComboBoxColumn ColumnProduct;
+        private DataGridViewTextBoxColumn ColumnQuantity;
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormContract.cs

@@ -0,0 +1,75 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using TradeAndProcurementEnterprice.Entities;
+using TradeAndProcurementEnterprice.Repositories;
+using TradeAndProcurementEnterprice.Repositories.Implementations;
+
+namespace TradeAndProcurementEnterprice.Forms
+{
+    public partial class FormContract : Form
+    {
+        private readonly IContractRepository _contractRepository;
+
+        public FormContract(IContractRepository contractRepository, IAgentsRepository agentsRepository,
+            IPurchasingCompanyRepository purchasingCompanyRepository, IProductRepository productRepository)
+        {
+            InitializeComponent();
+            _contractRepository = contractRepository ??
+                throw new ArgumentNullException(nameof(contractRepository));
+
+            comboBoxPurchasingCompany.DataSource = purchasingCompanyRepository.ReadCompanies();
+            comboBoxPurchasingCompany.DisplayMember = "Name";
+            comboBoxPurchasingCompany.ValueMember = "Id";
+
+            comboBoxAgent.DataSource = agentsRepository.ReadAgents();
+            comboBoxAgent.DisplayMember = "Name";
+            comboBoxAgent.ValueMember = "Id";
+
+            ColumnProduct.DataSource = productRepository.ReadProducts();
+            ColumnProduct.DisplayMember = "Nomenclature";
+            ColumnProduct.ValueMember = "Article";
+        }
+
+        private void ButtonSave_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                if (comboBoxAgent.SelectedIndex < 0 || comboBoxPurchasingCompany.SelectedIndex < 0 || dataGridViewProduct.RowCount < 1)
+                {
+                    throw new Exception("Имеются незаполненные поля!");
+                }
+
+                _contractRepository.CreateContract(Contract.CreateOperation(0,
+                    (int)comboBoxPurchasingCompany.SelectedValue!, (int)comboBoxAgent.SelectedValue!, CreateListProductSalesFromDataGrid()));
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при сохранении!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void ButtonCancel_Click(object sender, EventArgs e) => Close();
+
+        private List<ProductSales> CreateListProductSalesFromDataGrid()
+        {
+            var list = new List<ProductSales>();
+            foreach (DataGridViewRow row in dataGridViewProduct.Rows)
+            {
+                if (row.Cells["ColumnProduct"].Value == null || row.Cells["ColumnQuantity"].Value == null)
+                {
+                    continue;
+                }
+
+                list.Add(ProductSales.CreateElement(0, Convert.ToInt32(row.Cells["ColumnProduct"]), Convert.ToInt32(row.Cells["ColumnQuantity"])));
+            }
+            return list;
+        }
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormContract.resx

@@ -0,0 +1,126 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <metadata name="ColumnProduct.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>True</value>
+  </metadata>
+  <metadata name="ColumnQuantity.UserAddedColumn" type="System.Boolean, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
+    <value>True</value>
+  </metadata>
+</root>

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormContracts.Designer.cs

@@ -0,0 +1,104 @@
+namespace TradeAndProcurementEnterprice.Forms
+{
+    partial class FormContracts
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            panel1 = new Panel();
+            buttonAdd = new Button();
+            dataGridViewData = new DataGridView();
+            panel1.SuspendLayout();
+            ((System.ComponentModel.ISupportInitialize)dataGridViewData).BeginInit();
+            SuspendLayout();
+            // 
+            // panel1
+            // 
+            panel1.Controls.Add(buttonAdd);
+            panel1.Dock = DockStyle.Right;
+            panel1.Location = new Point(1196, 0);
+            panel1.Margin = new Padding(6, 6, 6, 6);
+            panel1.Name = "panel1";
+            panel1.Size = new Size(178, 929);
+            panel1.TabIndex = 0;
+            // 
+            // buttonAdd
+            // 
+            buttonAdd.BackgroundImage = Properties.Resources.add;
+            buttonAdd.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonAdd.Location = new Point(32, 26);
+            buttonAdd.Margin = new Padding(6, 6, 6, 6);
+            buttonAdd.Name = "buttonAdd";
+            buttonAdd.Size = new Size(121, 139);
+            buttonAdd.TabIndex = 1;
+            buttonAdd.UseVisualStyleBackColor = true;
+            buttonAdd.Click += ButtonAdd_Click;
+            // 
+            // dataGridViewData
+            // 
+            dataGridViewData.AllowUserToAddRows = false;
+            dataGridViewData.AllowUserToDeleteRows = false;
+            dataGridViewData.AllowUserToResizeColumns = false;
+            dataGridViewData.AllowUserToResizeRows = false;
+            dataGridViewData.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
+            dataGridViewData.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            dataGridViewData.Dock = DockStyle.Fill;
+            dataGridViewData.Location = new Point(0, 0);
+            dataGridViewData.Margin = new Padding(6, 6, 6, 6);
+            dataGridViewData.MultiSelect = false;
+            dataGridViewData.Name = "dataGridViewData";
+            dataGridViewData.ReadOnly = true;
+            dataGridViewData.RowHeadersVisible = false;
+            dataGridViewData.RowHeadersWidth = 82;
+            dataGridViewData.RowTemplate.Height = 25;
+            dataGridViewData.Size = new Size(1196, 929);
+            dataGridViewData.TabIndex = 1;
+            // 
+            // FormContracts
+            // 
+            AutoScaleDimensions = new SizeF(13F, 32F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(1374, 929);
+            Controls.Add(dataGridViewData);
+            Controls.Add(panel1);
+            Margin = new Padding(6, 6, 6, 6);
+            MinimumSize = new Size(1000, 630);
+            Name = "FormContracts";
+            StartPosition = FormStartPosition.CenterParent;
+            Text = "Продажи";
+            Load += FormContracts_Load;
+            panel1.ResumeLayout(false);
+            ((System.ComponentModel.ISupportInitialize)dataGridViewData).EndInit();
+            ResumeLayout(false);
+        }
+
+        #endregion
+
+        private Panel panel1;
+        private Button buttonAdd;
+        private DataGridView dataGridViewData;
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormContracts.cs

@@ -0,0 +1,58 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using TradeAndProcurementEnterprice.Repositories;
+using TradeAndProcurementEnterprice.Repositories.Implementations;
+using Unity;
+
+namespace TradeAndProcurementEnterprice.Forms
+{
+    public partial class FormContracts : Form
+    {
+        private readonly IUnityContainer _container;
+
+        private readonly IContractRepository _contractRepository;
+
+        public FormContracts(IUnityContainer container, IContractRepository contractRepository)
+        {
+            InitializeComponent();
+            _container = container ??
+                throw new ArgumentNullException(nameof(container));
+            _contractRepository = contractRepository ??
+                throw new ArgumentNullException(nameof(contractRepository));
+        }
+
+        private void FormContracts_Load(object sender, EventArgs e)
+        {
+            try
+            {
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при загрузке!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void ButtonAdd_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                _container.Resolve<FormContract>().ShowDialog();
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при добавлении!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void LoadList() => dataGridViewData.DataSource = _contractRepository.ReadContracts();
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormContracts.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormDelegateToAgent.Designer.cs

@@ -0,0 +1,160 @@
+namespace TradeAndProcurementEnterprice.Forms
+{
+    partial class FormDelegateToAgent
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            buttonCancel = new Button();
+            buttonSave = new Button();
+            numericUpDownQuantity = new NumericUpDown();
+            comboBoxAgent = new ComboBox();
+            labelQuantity = new Label();
+            labelAgent = new Label();
+            labelProduct = new Label();
+            comboBoxProduct = new ComboBox();
+            ((System.ComponentModel.ISupportInitialize)numericUpDownQuantity).BeginInit();
+            SuspendLayout();
+            // 
+            // buttonCancel
+            // 
+            buttonCancel.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;
+            buttonCancel.Location = new Point(282, 309);
+            buttonCancel.Margin = new Padding(6, 6, 6, 6);
+            buttonCancel.Name = "buttonCancel";
+            buttonCancel.Size = new Size(156, 49);
+            buttonCancel.TabIndex = 24;
+            buttonCancel.Text = "Отмена";
+            buttonCancel.UseVisualStyleBackColor = true;
+            buttonCancel.Click += ButtonCancel_Click;
+            // 
+            // buttonSave
+            // 
+            buttonSave.Anchor = AnchorStyles.Bottom | AnchorStyles.Left;
+            buttonSave.Location = new Point(82, 309);
+            buttonSave.Margin = new Padding(6, 6, 6, 6);
+            buttonSave.Name = "buttonSave";
+            buttonSave.Size = new Size(156, 49);
+            buttonSave.TabIndex = 25;
+            buttonSave.Text = "Сохранить";
+            buttonSave.UseVisualStyleBackColor = true;
+            buttonSave.Click += ButtonSave_Click;
+            // 
+            // numericUpDownQuantity
+            // 
+            numericUpDownQuantity.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
+            numericUpDownQuantity.Location = new Point(219, 128);
+            numericUpDownQuantity.Margin = new Padding(6, 6, 6, 6);
+            numericUpDownQuantity.Maximum = new decimal(new int[] { 1000000, 0, 0, 0 });
+            numericUpDownQuantity.Name = "numericUpDownQuantity";
+            numericUpDownQuantity.Size = new Size(277, 39);
+            numericUpDownQuantity.TabIndex = 23;
+            // 
+            // comboBoxAgent
+            // 
+            comboBoxAgent.Anchor = AnchorStyles.Top | AnchorStyles.Right;
+            comboBoxAgent.DropDownStyle = ComboBoxStyle.DropDownList;
+            comboBoxAgent.FormattingEnabled = true;
+            comboBoxAgent.Location = new Point(219, 220);
+            comboBoxAgent.Margin = new Padding(6, 6, 6, 6);
+            comboBoxAgent.Name = "comboBoxAgent";
+            comboBoxAgent.Size = new Size(273, 40);
+            comboBoxAgent.TabIndex = 22;
+            // 
+            // labelQuantity
+            // 
+            labelQuantity.AutoSize = true;
+            labelQuantity.Location = new Point(41, 132);
+            labelQuantity.Margin = new Padding(6, 0, 6, 0);
+            labelQuantity.Name = "labelQuantity";
+            labelQuantity.Size = new Size(144, 32);
+            labelQuantity.TabIndex = 15;
+            labelQuantity.Text = "Количество";
+            // 
+            // labelAgent
+            // 
+            labelAgent.Location = new Point(41, 208);
+            labelAgent.Margin = new Padding(6, 0, 6, 0);
+            labelAgent.Name = "labelAgent";
+            labelAgent.Size = new Size(150, 75);
+            labelAgent.TabIndex = 17;
+            labelAgent.Text = "Агент-\r\nреализатор";
+            // 
+            // labelProduct
+            // 
+            labelProduct.AutoSize = true;
+            labelProduct.Location = new Point(41, 45);
+            labelProduct.Margin = new Padding(6, 0, 6, 0);
+            labelProduct.Name = "labelProduct";
+            labelProduct.Size = new Size(181, 32);
+            labelProduct.TabIndex = 19;
+            labelProduct.Text = "Наименование";
+            // 
+            // comboBoxProduct
+            // 
+            comboBoxProduct.Anchor = AnchorStyles.Top | AnchorStyles.Right;
+            comboBoxProduct.DropDownStyle = ComboBoxStyle.DropDownList;
+            comboBoxProduct.FormattingEnabled = true;
+            comboBoxProduct.Location = new Point(219, 38);
+            comboBoxProduct.Margin = new Padding(6, 6, 6, 6);
+            comboBoxProduct.Name = "comboBoxProduct";
+            comboBoxProduct.Size = new Size(273, 40);
+            comboBoxProduct.TabIndex = 22;
+            // 
+            // FormDelegateToAgent
+            // 
+            AutoScaleDimensions = new SizeF(13F, 32F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(554, 409);
+            Controls.Add(buttonCancel);
+            Controls.Add(buttonSave);
+            Controls.Add(numericUpDownQuantity);
+            Controls.Add(comboBoxProduct);
+            Controls.Add(comboBoxAgent);
+            Controls.Add(labelQuantity);
+            Controls.Add(labelAgent);
+            Controls.Add(labelProduct);
+            Margin = new Padding(6, 6, 6, 6);
+            MinimumSize = new Size(580, 480);
+            Name = "FormDelegateToAgent";
+            StartPosition = FormStartPosition.CenterParent;
+            Text = "Передача агентам";
+            ((System.ComponentModel.ISupportInitialize)numericUpDownQuantity).EndInit();
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+        private Button buttonCancel;
+        private Button buttonSave;
+        private NumericUpDown numericUpDownQuantity;
+        private ComboBox comboBoxAgent;
+        private Label labelQuantity;
+        private Label labelAgent;
+        private Label labelProduct;
+        private ComboBox comboBoxProduct;
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormDelegateToAgent.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using TradeAndProcurementEnterprice.Entities;
+using TradeAndProcurementEnterprice.Repositories;
+
+namespace TradeAndProcurementEnterprice.Forms
+{
+    public partial class FormDelegateToAgent : Form
+    {
+        private readonly IDelegateToAgentRepository _delegateToAgentRepository;
+
+        public FormDelegateToAgent(IDelegateToAgentRepository delegateToAgentRepository, IProductRepository productRepository,
+            IAgentsRepository agentsRepository)
+        {
+            InitializeComponent();
+            _delegateToAgentRepository = delegateToAgentRepository ??
+                throw new ArgumentNullException(nameof(delegateToAgentRepository));
+
+            comboBoxProduct.DataSource = productRepository.ReadProducts();
+            comboBoxProduct.DisplayMember = "Nomenclature";
+            comboBoxProduct.ValueMember = "Article";
+
+            comboBoxAgent.DataSource = agentsRepository.ReadAgents();
+            comboBoxAgent.DisplayMember = "Name";
+            comboBoxAgent.ValueMember = "Id";
+        }
+
+        private void ButtonSave_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                if (comboBoxProduct.SelectedIndex < 0 || comboBoxAgent.SelectedIndex < 0)
+                {
+                    throw new Exception("Имеются незаполненные поля!");
+                }
+
+                _delegateToAgentRepository.CreateDelegatesToAgent(DelegateToAgents.CreateOperation(0,
+                    (int)comboBoxProduct.SelectedValue!, Convert.ToInt32(numericUpDownQuantity.Value),
+                    (int)comboBoxAgent.SelectedValue!));
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при сохранении!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void ButtonCancel_Click(object sender, EventArgs e) => Close();
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormDelegateToAgent.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormDelegatesToAgents.Designer.cs

@@ -0,0 +1,104 @@
+namespace TradeAndProcurementEnterprice.Forms
+{
+    partial class FormDelegatesToAgents
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            panel1 = new Panel();
+            buttonAdd = new Button();
+            dataGridViewData = new DataGridView();
+            panel1.SuspendLayout();
+            ((System.ComponentModel.ISupportInitialize)dataGridViewData).BeginInit();
+            SuspendLayout();
+            // 
+            // panel1
+            // 
+            panel1.Controls.Add(buttonAdd);
+            panel1.Dock = DockStyle.Right;
+            panel1.Location = new Point(1196, 0);
+            panel1.Margin = new Padding(6, 6, 6, 6);
+            panel1.Name = "panel1";
+            panel1.Size = new Size(178, 929);
+            panel1.TabIndex = 0;
+            // 
+            // buttonAdd
+            // 
+            buttonAdd.BackgroundImage = Properties.Resources.add;
+            buttonAdd.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonAdd.Location = new Point(32, 26);
+            buttonAdd.Margin = new Padding(6, 6, 6, 6);
+            buttonAdd.Name = "buttonAdd";
+            buttonAdd.Size = new Size(121, 139);
+            buttonAdd.TabIndex = 1;
+            buttonAdd.UseVisualStyleBackColor = true;
+            buttonAdd.Click += ButtonAdd_Click;
+            // 
+            // dataGridViewData
+            // 
+            dataGridViewData.AllowUserToAddRows = false;
+            dataGridViewData.AllowUserToDeleteRows = false;
+            dataGridViewData.AllowUserToResizeColumns = false;
+            dataGridViewData.AllowUserToResizeRows = false;
+            dataGridViewData.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
+            dataGridViewData.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            dataGridViewData.Dock = DockStyle.Fill;
+            dataGridViewData.Location = new Point(0, 0);
+            dataGridViewData.Margin = new Padding(6, 6, 6, 6);
+            dataGridViewData.MultiSelect = false;
+            dataGridViewData.Name = "dataGridViewData";
+            dataGridViewData.ReadOnly = true;
+            dataGridViewData.RowHeadersVisible = false;
+            dataGridViewData.RowHeadersWidth = 82;
+            dataGridViewData.RowTemplate.Height = 25;
+            dataGridViewData.Size = new Size(1196, 929);
+            dataGridViewData.TabIndex = 1;
+            // 
+            // FormDelegatesToAgents
+            // 
+            AutoScaleDimensions = new SizeF(13F, 32F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(1374, 929);
+            Controls.Add(dataGridViewData);
+            Controls.Add(panel1);
+            Margin = new Padding(6, 6, 6, 6);
+            MinimumSize = new Size(1000, 630);
+            Name = "FormDelegatesToAgents";
+            StartPosition = FormStartPosition.CenterParent;
+            Text = "Передача товара агентам-реализаторам";
+            Load += FormDelegatesToAgents_Load;
+            panel1.ResumeLayout(false);
+            ((System.ComponentModel.ISupportInitialize)dataGridViewData).EndInit();
+            ResumeLayout(false);
+        }
+
+        #endregion
+
+        private Panel panel1;
+        private Button buttonAdd;
+        private DataGridView dataGridViewData;
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormDelegatesToAgents.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using TradeAndProcurementEnterprice.Repositories;
+using Unity;
+
+namespace TradeAndProcurementEnterprice.Forms
+{
+    public partial class FormDelegatesToAgents : Form
+    {
+        private readonly IUnityContainer _container;
+
+        private readonly IDelegateToAgentRepository _delegateToAgentRepository;
+
+        public FormDelegatesToAgents(IUnityContainer container, IDelegateToAgentRepository delegateToAgentRepository)
+        {
+            InitializeComponent();
+            _container = container ??
+                throw new ArgumentNullException(nameof(container));
+            _delegateToAgentRepository = delegateToAgentRepository ??
+                throw new ArgumentNullException(nameof(delegateToAgentRepository));
+        }
+
+        private void FormDelegatesToAgents_Load(object sender, EventArgs e)
+        {
+            try
+            {
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при загрузке!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void ButtonAdd_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                _container.Resolve<FormDelegateToAgent>().ShowDialog();
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при добавлении!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+        private void LoadList() => dataGridViewData.DataSource = _delegateToAgentRepository.ReadDelegatesToAgent();
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormDelegatesToAgents.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormProduct.Designer.cs

@@ -0,0 +1,200 @@
+namespace TradeAndProcurementEnterprice.Forms
+{
+    partial class FormProduct
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            labelNomenclature = new Label();
+            labelPrice = new Label();
+            labelUnit = new Label();
+            labelCategory = new Label();
+            labelInventoryQuantity = new Label();
+            textBoxNomenclature = new TextBox();
+            numericUpDownPrice = new NumericUpDown();
+            comboBoxUnit = new ComboBox();
+            numericUpDownQuantity = new NumericUpDown();
+            buttonSave = new Button();
+            buttonCancel = new Button();
+            comboBoxCategory = new ComboBox();
+            ((System.ComponentModel.ISupportInitialize)numericUpDownPrice).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)numericUpDownQuantity).BeginInit();
+            SuspendLayout();
+            // 
+            // labelNomenclature
+            // 
+            labelNomenclature.AutoSize = true;
+            labelNomenclature.Location = new Point(26, 27);
+            labelNomenclature.Name = "labelNomenclature";
+            labelNomenclature.Size = new Size(180, 33);
+            labelNomenclature.TabIndex = 0;
+            labelNomenclature.Text = "Номенклатура";
+            // 
+            // labelPrice
+            // 
+            labelPrice.Location = new Point(26, 84);
+            labelPrice.Name = "labelPrice";
+            labelPrice.Size = new Size(158, 73);
+            labelPrice.TabIndex = 0;
+            labelPrice.Text = "Цена за единицу";
+            // 
+            // labelUnit
+            // 
+            labelUnit.Location = new Point(26, 163);
+            labelUnit.Name = "labelUnit";
+            labelUnit.Size = new Size(158, 73);
+            labelUnit.TabIndex = 0;
+            labelUnit.Text = "Единица измерения";
+            // 
+            // labelCategory
+            // 
+            labelCategory.AutoSize = true;
+            labelCategory.Location = new Point(26, 270);
+            labelCategory.Name = "labelCategory";
+            labelCategory.Size = new Size(131, 33);
+            labelCategory.TabIndex = 0;
+            labelCategory.Text = "Категория";
+            // 
+            // labelInventoryQuantity
+            // 
+            labelInventoryQuantity.Location = new Point(26, 331);
+            labelInventoryQuantity.Name = "labelInventoryQuantity";
+            labelInventoryQuantity.Size = new Size(158, 72);
+            labelInventoryQuantity.TabIndex = 0;
+            labelInventoryQuantity.Text = "Количество на складе";
+            // 
+            // textBoxNomenclature
+            // 
+            textBoxNomenclature.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
+            textBoxNomenclature.Location = new Point(248, 24);
+            textBoxNomenclature.Name = "textBoxNomenclature";
+            textBoxNomenclature.Size = new Size(237, 41);
+            textBoxNomenclature.TabIndex = 1;
+            // 
+            // numericUpDownPrice
+            // 
+            numericUpDownPrice.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
+            numericUpDownPrice.DecimalPlaces = 2;
+            numericUpDownPrice.Location = new Point(248, 100);
+            numericUpDownPrice.Name = "numericUpDownPrice";
+            numericUpDownPrice.Size = new Size(237, 41);
+            numericUpDownPrice.TabIndex = 2;
+            // 
+            // comboBoxUnit
+            // 
+            comboBoxUnit.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
+            comboBoxUnit.DropDownStyle = ComboBoxStyle.DropDownList;
+            comboBoxUnit.FormattingEnabled = true;
+            comboBoxUnit.Location = new Point(248, 179);
+            comboBoxUnit.Name = "comboBoxUnit";
+            comboBoxUnit.Size = new Size(237, 41);
+            comboBoxUnit.TabIndex = 3;
+            // 
+            // numericUpDownQuantity
+            // 
+            numericUpDownQuantity.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
+            numericUpDownQuantity.Location = new Point(248, 343);
+            numericUpDownQuantity.Maximum = new decimal(new int[] { 1000000, 0, 0, 0 });
+            numericUpDownQuantity.Name = "numericUpDownQuantity";
+            numericUpDownQuantity.Size = new Size(237, 41);
+            numericUpDownQuantity.TabIndex = 4;
+            // 
+            // buttonSave
+            // 
+            buttonSave.Anchor = AnchorStyles.Bottom | AnchorStyles.Left;
+            buttonSave.Location = new Point(44, 424);
+            buttonSave.Name = "buttonSave";
+            buttonSave.Size = new Size(201, 46);
+            buttonSave.TabIndex = 5;
+            buttonSave.Text = "Сохранить";
+            buttonSave.UseVisualStyleBackColor = true;
+            buttonSave.Click += ButtonSave_Click;
+            // 
+            // buttonCancel
+            // 
+            buttonCancel.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;
+            buttonCancel.Location = new Point(274, 424);
+            buttonCancel.Name = "buttonCancel";
+            buttonCancel.Size = new Size(201, 46);
+            buttonCancel.TabIndex = 5;
+            buttonCancel.Text = "Отмена";
+            buttonCancel.UseVisualStyleBackColor = true;
+            buttonCancel.Click += ButtonCancel_Click;
+            // 
+            // comboBoxCategory
+            // 
+            comboBoxCategory.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
+            comboBoxCategory.DropDownStyle = ComboBoxStyle.DropDownList;
+            comboBoxCategory.FormattingEnabled = true;
+            comboBoxCategory.Location = new Point(248, 262);
+            comboBoxCategory.Name = "comboBoxCategory";
+            comboBoxCategory.Size = new Size(237, 41);
+            comboBoxCategory.TabIndex = 14;
+            // 
+            // FormProduct
+            // 
+            AutoScaleDimensions = new SizeF(15F, 33F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(559, 514);
+            Controls.Add(comboBoxCategory);
+            Controls.Add(buttonCancel);
+            Controls.Add(buttonSave);
+            Controls.Add(numericUpDownQuantity);
+            Controls.Add(comboBoxUnit);
+            Controls.Add(numericUpDownPrice);
+            Controls.Add(textBoxNomenclature);
+            Controls.Add(labelInventoryQuantity);
+            Controls.Add(labelCategory);
+            Controls.Add(labelUnit);
+            Controls.Add(labelPrice);
+            Controls.Add(labelNomenclature);
+            Font = new Font("Comic Sans MS", 9F, FontStyle.Regular, GraphicsUnit.Point);
+            MinimumSize = new Size(585, 585);
+            Name = "FormProduct";
+            StartPosition = FormStartPosition.CenterParent;
+            Text = "Номенклатура";
+            ((System.ComponentModel.ISupportInitialize)numericUpDownPrice).EndInit();
+            ((System.ComponentModel.ISupportInitialize)numericUpDownQuantity).EndInit();
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+
+        private Label labelNomenclature;
+        private Label labelPrice;
+        private Label labelUnit;
+        private Label labelCategory;
+        private Label labelInventoryQuantity;
+        private TextBox textBoxNomenclature;
+        private NumericUpDown numericUpDownPrice;
+        private ComboBox comboBoxUnit;
+        private NumericUpDown numericUpDownQuantity;
+        private Button buttonSave;
+        private Button buttonCancel;
+        private ComboBox comboBoxCategory;
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormProduct.cs

@@ -0,0 +1,92 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using TradeAndProcurementEnterprice.Repositories;
+using TradeAndProcurementEnterprice.Entities;
+using TradeAndProcurementEnterprice.Entities.Enums;
+
+namespace TradeAndProcurementEnterprice.Forms
+{
+    public partial class FormProduct : Form
+    {
+        private readonly IProductRepository _productRepository;
+
+        private int? _productArticle;
+
+        public int Article
+        {
+            set
+            {
+                try
+                {
+                    var product = _productRepository.ReadProductByArticle(value);
+                    if (product == null)
+                    {
+                        throw new InvalidDataException(nameof(product));
+                    }
+
+                    textBoxNomenclature.Text = product.Nomenclature;
+                    numericUpDownPrice.Value = product.SellingPrice;
+                    comboBoxUnit.SelectedItem = product.Unit;
+                    comboBoxCategory.SelectedItem = product.Category;
+                    numericUpDownQuantity.Value = product.InventoryQuantity;
+                    _productArticle = value;
+                }
+                catch (Exception ex)
+                {
+                    MessageBox.Show(ex.Message, "Ошибка при получении данных!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                    return;
+                }
+            }
+        }
+
+        public FormProduct(IProductRepository productRepository)
+        {
+            InitializeComponent();
+            _productRepository = productRepository ??
+                throw new ArgumentNullException(nameof(productRepository));
+
+            comboBoxUnit.DataSource = Enum.GetValues(typeof(Unit));
+            comboBoxCategory.DataSource = Enum.GetValues(typeof(Category));
+        }
+
+        private void ButtonSave_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                if (string.IsNullOrEmpty(textBoxNomenclature.Text) || comboBoxUnit.SelectedIndex < 1
+                    || comboBoxCategory.SelectedIndex < 1)
+                {
+                    throw new Exception("Имеются незаполненные поля!");
+                }
+
+                if (_productArticle.HasValue)
+                {
+                    _productRepository.UpdateProduct(CreateProduct(_productArticle.Value));
+                }
+                else
+                {
+                    _productRepository.CreateProduct(CreateProduct(0));
+                }
+
+                Close();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при сохранении!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void ButtonCancel_Click(object sender, EventArgs e) => Close();
+
+        private Product CreateProduct(int article) => Product.CreateEntity(article, textBoxNomenclature.Text,
+            numericUpDownPrice.Value, (Unit)comboBoxUnit.SelectedItem, (Category)comboBoxCategory.SelectedItem,
+            Convert.ToInt32(numericUpDownQuantity.Value));
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormProduct.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormProducts.Designer.cs

@@ -0,0 +1,134 @@
+namespace TradeAndProcurementEnterprice.Forms
+{
+    partial class FormProducts
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            panel1 = new Panel();
+            buttonDel = new Button();
+            buttonEdit = new Button();
+            buttonAdd = new Button();
+            dataGridViewData = new DataGridView();
+            panel1.SuspendLayout();
+            ((System.ComponentModel.ISupportInitialize)dataGridViewData).BeginInit();
+            SuspendLayout();
+            // 
+            // panel1
+            // 
+            panel1.Controls.Add(buttonDel);
+            panel1.Controls.Add(buttonEdit);
+            panel1.Controls.Add(buttonAdd);
+            panel1.Dock = DockStyle.Right;
+            panel1.Location = new Point(1196, 0);
+            panel1.Margin = new Padding(6, 6, 6, 6);
+            panel1.Name = "panel1";
+            panel1.Size = new Size(178, 929);
+            panel1.TabIndex = 0;
+            // 
+            // buttonDel
+            // 
+            buttonDel.BackgroundImage = Properties.Resources.remove;
+            buttonDel.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonDel.Location = new Point(32, 390);
+            buttonDel.Margin = new Padding(6, 6, 6, 6);
+            buttonDel.Name = "buttonDel";
+            buttonDel.Size = new Size(121, 139);
+            buttonDel.TabIndex = 3;
+            buttonDel.UseVisualStyleBackColor = true;
+            buttonDel.Click += ButtonDel_Click;
+            // 
+            // buttonEdit
+            // 
+            buttonEdit.BackgroundImage = Properties.Resources.edit;
+            buttonEdit.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonEdit.Location = new Point(32, 203);
+            buttonEdit.Margin = new Padding(6, 6, 6, 6);
+            buttonEdit.Name = "buttonEdit";
+            buttonEdit.Size = new Size(121, 139);
+            buttonEdit.TabIndex = 2;
+            buttonEdit.UseVisualStyleBackColor = true;
+            buttonEdit.Click += ButtonEdit_Click;
+            // 
+            // buttonAdd
+            // 
+            buttonAdd.BackgroundImage = Properties.Resources.add;
+            buttonAdd.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonAdd.Location = new Point(32, 26);
+            buttonAdd.Margin = new Padding(6, 6, 6, 6);
+            buttonAdd.Name = "buttonAdd";
+            buttonAdd.Size = new Size(121, 139);
+            buttonAdd.TabIndex = 1;
+            buttonAdd.UseVisualStyleBackColor = true;
+            buttonAdd.Click += ButtonAdd_Click;
+            // 
+            // dataGridViewData
+            // 
+            dataGridViewData.AllowUserToAddRows = false;
+            dataGridViewData.AllowUserToDeleteRows = false;
+            dataGridViewData.AllowUserToResizeColumns = false;
+            dataGridViewData.AllowUserToResizeRows = false;
+            dataGridViewData.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
+            dataGridViewData.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            dataGridViewData.Dock = DockStyle.Fill;
+            dataGridViewData.Location = new Point(0, 0);
+            dataGridViewData.Margin = new Padding(6, 6, 6, 6);
+            dataGridViewData.MultiSelect = false;
+            dataGridViewData.Name = "dataGridViewData";
+            dataGridViewData.ReadOnly = true;
+            dataGridViewData.RowHeadersVisible = false;
+            dataGridViewData.RowHeadersWidth = 82;
+            dataGridViewData.RowTemplate.Height = 25;
+            dataGridViewData.Size = new Size(1196, 929);
+            dataGridViewData.TabIndex = 1;
+            // 
+            // FormProducts
+            // 
+            AutoScaleDimensions = new SizeF(13F, 32F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(1374, 929);
+            Controls.Add(dataGridViewData);
+            Controls.Add(panel1);
+            Margin = new Padding(6, 6, 6, 6);
+            MinimumSize = new Size(1000, 630);
+            Name = "FormProducts";
+            StartPosition = FormStartPosition.CenterParent;
+            Text = "Номенклатура";
+            Load += FormProducts_Load;
+            panel1.ResumeLayout(false);
+            ((System.ComponentModel.ISupportInitialize)dataGridViewData).EndInit();
+            ResumeLayout(false);
+        }
+
+        #endregion
+
+        private Panel panel1;
+        private Button buttonAdd;
+        private Button buttonDel;
+        private Button buttonEdit;
+        private DataGridView dataGridViewData;
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormProducts.cs

@@ -0,0 +1,113 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using TradeAndProcurementEnterprice.Repositories;
+using Unity;
+
+namespace TradeAndProcurementEnterprice.Forms
+{
+    public partial class FormProducts : Form
+    {
+        private readonly IUnityContainer _container;
+
+        private readonly IProductRepository _productRepository;
+
+        public FormProducts(IUnityContainer container, IProductRepository productRepository)
+        {
+            InitializeComponent();
+            _container = container ??
+                throw new ArgumentNullException(nameof(container));
+            _productRepository = productRepository ??
+                throw new ArgumentNullException(nameof(productRepository));
+        }
+
+        private void FormProducts_Load(object sender, EventArgs e)
+        {
+            try
+            {
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при загрузке!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void ButtonAdd_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                _container.Resolve<FormProduct>().ShowDialog();
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при добавлении!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void ButtonEdit_Click(object sender, EventArgs e)
+        {
+            if (!TryGetIdFromSelectedRow(out var findId))
+            {
+                return;
+            }
+
+            try
+            {
+                var form = _container.Resolve<FormProduct>();
+                form.Article = findId;
+                form.ShowDialog();
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при изменении!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void ButtonDel_Click(object sender, EventArgs e)
+        {
+            if (!TryGetIdFromSelectedRow(out var findId))
+            {
+                return;
+            }
+
+            if (MessageBox.Show("Удалить запись?", "Удаление", MessageBoxButtons.YesNo) != DialogResult.Yes)
+            {
+                return;
+            }
+
+            try
+            {
+                _productRepository.DeleteProduct(findId);
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при удалении!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void LoadList() => dataGridViewData.DataSource = _productRepository.ReadProducts();
+
+        private bool TryGetIdFromSelectedRow(out int id)
+        {
+            id = 0;
+            if (dataGridViewData.SelectedRows.Count < 1)
+            {
+                MessageBox.Show("Нет выбранной записи!", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return false;
+            }
+
+            id = Convert.ToInt32(dataGridViewData.SelectedRows[0].Cells["Article"].Value);
+            return true;
+        }
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormProducts.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormPurchasingCompanies.Designer.cs

@@ -0,0 +1,134 @@
+namespace TradeAndProcurementEnterprice.Forms
+{
+    partial class FormPurchasingCompanies
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            panel1 = new Panel();
+            buttonDel = new Button();
+            buttonEdit = new Button();
+            buttonAdd = new Button();
+            dataGridViewData = new DataGridView();
+            panel1.SuspendLayout();
+            ((System.ComponentModel.ISupportInitialize)dataGridViewData).BeginInit();
+            SuspendLayout();
+            // 
+            // panel1
+            // 
+            panel1.Controls.Add(buttonDel);
+            panel1.Controls.Add(buttonEdit);
+            panel1.Controls.Add(buttonAdd);
+            panel1.Dock = DockStyle.Right;
+            panel1.Location = new Point(1196, 0);
+            panel1.Margin = new Padding(6, 6, 6, 6);
+            panel1.Name = "panel1";
+            panel1.Size = new Size(178, 929);
+            panel1.TabIndex = 0;
+            // 
+            // buttonDel
+            // 
+            buttonDel.BackgroundImage = Properties.Resources.remove;
+            buttonDel.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonDel.Location = new Point(32, 390);
+            buttonDel.Margin = new Padding(6, 6, 6, 6);
+            buttonDel.Name = "buttonDel";
+            buttonDel.Size = new Size(121, 139);
+            buttonDel.TabIndex = 3;
+            buttonDel.UseVisualStyleBackColor = true;
+            buttonDel.Click += ButtonDel_Click;
+            // 
+            // buttonEdit
+            // 
+            buttonEdit.BackgroundImage = Properties.Resources.edit;
+            buttonEdit.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonEdit.Location = new Point(32, 203);
+            buttonEdit.Margin = new Padding(6, 6, 6, 6);
+            buttonEdit.Name = "buttonEdit";
+            buttonEdit.Size = new Size(121, 139);
+            buttonEdit.TabIndex = 2;
+            buttonEdit.UseVisualStyleBackColor = true;
+            buttonEdit.Click += ButtonEdit_Click;
+            // 
+            // buttonAdd
+            // 
+            buttonAdd.BackgroundImage = Properties.Resources.add;
+            buttonAdd.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonAdd.Location = new Point(32, 26);
+            buttonAdd.Margin = new Padding(6, 6, 6, 6);
+            buttonAdd.Name = "buttonAdd";
+            buttonAdd.Size = new Size(121, 139);
+            buttonAdd.TabIndex = 1;
+            buttonAdd.UseVisualStyleBackColor = true;
+            buttonAdd.Click += ButtonAdd_Click;
+            // 
+            // dataGridViewData
+            // 
+            dataGridViewData.AllowUserToAddRows = false;
+            dataGridViewData.AllowUserToDeleteRows = false;
+            dataGridViewData.AllowUserToResizeColumns = false;
+            dataGridViewData.AllowUserToResizeRows = false;
+            dataGridViewData.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
+            dataGridViewData.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            dataGridViewData.Dock = DockStyle.Fill;
+            dataGridViewData.Location = new Point(0, 0);
+            dataGridViewData.Margin = new Padding(6, 6, 6, 6);
+            dataGridViewData.MultiSelect = false;
+            dataGridViewData.Name = "dataGridViewData";
+            dataGridViewData.ReadOnly = true;
+            dataGridViewData.RowHeadersVisible = false;
+            dataGridViewData.RowHeadersWidth = 82;
+            dataGridViewData.RowTemplate.Height = 25;
+            dataGridViewData.Size = new Size(1196, 929);
+            dataGridViewData.TabIndex = 1;
+            // 
+            // FormPurchasingCompanies
+            // 
+            AutoScaleDimensions = new SizeF(13F, 32F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(1374, 929);
+            Controls.Add(dataGridViewData);
+            Controls.Add(panel1);
+            Margin = new Padding(6, 6, 6, 6);
+            MinimumSize = new Size(1000, 630);
+            Name = "FormPurchasingCompanies";
+            StartPosition = FormStartPosition.CenterParent;
+            Text = "Компании закупщики";
+            Load += FormPurchasingCompanies_Load;
+            panel1.ResumeLayout(false);
+            ((System.ComponentModel.ISupportInitialize)dataGridViewData).EndInit();
+            ResumeLayout(false);
+        }
+
+        #endregion
+
+        private Panel panel1;
+        private Button buttonAdd;
+        private Button buttonDel;
+        private Button buttonEdit;
+        private DataGridView dataGridViewData;
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormPurchasingCompanies.cs

@@ -0,0 +1,115 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using System.Xml.Linq;
+using TradeAndProcurementEnterprice.Repositories;
+using TradeAndProcurementEnterprice.Repositories.Implementations;
+using Unity;
+
+namespace TradeAndProcurementEnterprice.Forms
+{
+    public partial class FormPurchasingCompanies : Form
+    {
+        private readonly IUnityContainer _container;
+
+        private readonly IPurchasingCompanyRepository _companyRepository;
+
+        public FormPurchasingCompanies(IUnityContainer container, IPurchasingCompanyRepository companyRepository)
+        {
+            InitializeComponent();
+            _container = container ??
+                throw new ArgumentNullException(nameof(container));
+            _companyRepository = companyRepository ??
+                throw new ArgumentNullException(nameof(companyRepository));
+        }
+
+        private void FormPurchasingCompanies_Load(object sender, EventArgs e)
+        {
+            try
+            {
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при загрузке!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void ButtonAdd_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                _container.Resolve<FormPurchasingCompany>().ShowDialog();
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при добавлении!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void ButtonEdit_Click(object sender, EventArgs e)
+        {
+            if (!TryGetIdFromSelectedRow(out var findId))
+            {
+                return;
+            }
+
+            try
+            {
+                var form = _container.Resolve<FormPurchasingCompany>();
+                form.Id = findId;
+                form.ShowDialog();
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при изменении!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void ButtonDel_Click(object sender, EventArgs e)
+        {
+            if (!TryGetIdFromSelectedRow(out var findId))
+            {
+                return;
+            }
+
+            if (MessageBox.Show("Удалить запись?", "Удаление", MessageBoxButtons.YesNo) != DialogResult.Yes)
+            {
+                return;
+            }
+
+            try
+            {
+                _companyRepository.DeleteCompany(findId);
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при удалении!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void LoadList() => dataGridViewData.DataSource = _companyRepository.ReadCompanies();
+
+        private bool TryGetIdFromSelectedRow(out int id)
+        {
+            id = 0;
+            if (dataGridViewData.SelectedRows.Count < 1)
+            {
+                MessageBox.Show("Нет выбранной записи!", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return false;
+            }
+
+            id = Convert.ToInt32(dataGridViewData.SelectedRows[0].Cells["Id"].Value);
+            return true;
+        }
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormPurchasingCompanies.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormPurchasingCompany.Designer.cs

@@ -0,0 +1,104 @@
+namespace TradeAndProcurementEnterprice.Forms
+{
+    partial class FormPurchasingCompany
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            textBoxName = new TextBox();
+            labelName = new Label();
+            buttonSave = new Button();
+            buttonCancel = new Button();
+            SuspendLayout();
+            // 
+            // textBoxName
+            // 
+            textBoxName.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
+            textBoxName.Location = new Point(243, 46);
+            textBoxName.Margin = new Padding(6, 6, 6, 6);
+            textBoxName.Name = "textBoxName";
+            textBoxName.Size = new Size(271, 39);
+            textBoxName.TabIndex = 19;
+            // 
+            // labelName
+            // 
+            labelName.AutoSize = true;
+            labelName.Location = new Point(50, 49);
+            labelName.Margin = new Padding(6, 0, 6, 0);
+            labelName.Name = "labelName";
+            labelName.Size = new Size(181, 32);
+            labelName.TabIndex = 18;
+            labelName.Text = "Наименование";
+            // 
+            // buttonSave
+            // 
+            buttonSave.Anchor = AnchorStyles.Bottom | AnchorStyles.Left;
+            buttonSave.Location = new Point(91, 121);
+            buttonSave.Margin = new Padding(6, 6, 6, 6);
+            buttonSave.Name = "buttonSave";
+            buttonSave.Size = new Size(156, 49);
+            buttonSave.TabIndex = 21;
+            buttonSave.Text = "Сохранить";
+            buttonSave.UseVisualStyleBackColor = true;
+            buttonSave.Click += ButtonSave_Click;
+            // 
+            // buttonCancel
+            // 
+            buttonCancel.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;
+            buttonCancel.Location = new Point(290, 121);
+            buttonCancel.Margin = new Padding(6, 6, 6, 6);
+            buttonCancel.Name = "buttonCancel";
+            buttonCancel.Size = new Size(156, 49);
+            buttonCancel.TabIndex = 20;
+            buttonCancel.Text = "Отмена";
+            buttonCancel.UseVisualStyleBackColor = true;
+            buttonCancel.Click += ButtonCancel_Click;
+            // 
+            // FormPurchasingCompany
+            // 
+            AutoScaleDimensions = new SizeF(13F, 32F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(564, 219);
+            Controls.Add(buttonCancel);
+            Controls.Add(buttonSave);
+            Controls.Add(textBoxName);
+            Controls.Add(labelName);
+            Margin = new Padding(6, 6, 6, 6);
+            MinimumSize = new Size(590, 290);
+            Name = "FormPurchasingCompany";
+            StartPosition = FormStartPosition.CenterParent;
+            Text = "Компания закупщик";
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+        private TextBox textBoxName;
+        private Label labelName;
+        private Button buttonSave;
+        private Button buttonCancel;
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormPurchasingCompany.cs

@@ -0,0 +1,84 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using TradeAndProcurementEnterprice.Entities;
+using TradeAndProcurementEnterprice.Entities.Enums;
+using TradeAndProcurementEnterprice.Repositories;
+using TradeAndProcurementEnterprice.Repositories.Implementations;
+
+namespace TradeAndProcurementEnterprice.Forms
+{
+    public partial class FormPurchasingCompany : Form
+    {
+        private readonly IPurchasingCompanyRepository _purchasingCompanyRepository;
+
+        private int? _companyId;
+
+        public int Id
+        {
+            set
+            {
+                try
+                {
+                    var company = _purchasingCompanyRepository.ReadCompaniesByID(value);
+                    if (company == null)
+                    {
+                        throw new InvalidDataException(nameof(company));
+                    }
+
+                    textBoxName.Text = company.Name;
+                    _companyId = value;
+                }
+                catch (Exception ex)
+                {
+                    MessageBox.Show(ex.Message, "Ошибка при получении данных!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                    return;
+                }
+            }
+        }
+
+        public FormPurchasingCompany(IPurchasingCompanyRepository purchasingCompanyRepository)
+        {
+            InitializeComponent();
+            _purchasingCompanyRepository = purchasingCompanyRepository ??
+                throw new ArgumentNullException(nameof(purchasingCompanyRepository));
+        }
+
+        private void ButtonSave_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                if (string.IsNullOrWhiteSpace(textBoxName.Text))
+                {
+                    throw new Exception("Имеются незаполненные поля!");
+                }
+
+                if (_companyId.HasValue)
+                {
+                    _purchasingCompanyRepository.UpdateCompanies(CreateCompany(_companyId.Value));
+                }
+                else
+                {
+                    _purchasingCompanyRepository.CreateCompany(CreateCompany(0));
+                }
+
+                Close();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при сохранении!", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void ButtonCancel_Click(object sender, EventArgs e) => Close();
+
+        private PurchasingCompany CreateCompany(int id) =>
+            PurchasingCompany.CreateEntity(id, textBoxName.Text);
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Forms/FormPurchasingCompany.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!--
+    Microsoft ResX Schema
+
+    Version 2.0
+
+    The primary goals of this format is to allow a simple XML format
+    that is mostly human readable. The generation and parsing of the
+    various data types are done through the TypeConverter classes
+    associated with the data types.
+
+    Example:
+
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+
+    There are any number of "resheader" rows that contain simple
+    name/value pairs.
+
+    Each data row contains a name, and value. The row also contains a
+    type or mimetype. Type corresponds to a .NET class that support
+    text/value conversion through the TypeConverter architecture.
+    Classes that don't support this are serialized and stored with the
+    mimetype set.
+
+    The mimetype is used for serialized objects, and tells the
+    ResXResourceReader how to depersist the object. This is currently not
+    extensible. For a given mimetype the value must be set accordingly:
+
+    Note - application/x-microsoft.net.object.binary.base64 is the format
+    that the ResXResourceWriter will generate, however the reader can
+    read any of the formats listed below.
+
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Program.cs

@@ -1,3 +1,8 @@
+using TradeAndProcurementEnterprice.Repositories;
+using TradeAndProcurementEnterprice.Repositories.Implementations;
+using Unity;
+using Unity.Lifetime;
+
 namespace TradeAndProcurementEnterprice
 {
     internal static class Program
@@ -11,7 +16,20 @@ namespace TradeAndProcurementEnterprice
             // To customize application configuration such as set high DPI settings or default font,
             // see https://aka.ms/applicationconfiguration.
             ApplicationConfiguration.Initialize();
-            Application.Run(new Form1());
+            Application.Run(CreateContainer().Resolve<FormEnterprice>());
+        }
+
+        private static IUnityContainer CreateContainer()
+        {
+            var container = new UnityContainer();
+
+            container.RegisterType<IAgentsRepository, AgentsRepository>(new TransientLifetimeManager());
+            container.RegisterType<IContractRepository, ContractRepository>(new TransientLifetimeManager());
+            container.RegisterType<IProductRepository, ProductRepository>(new TransientLifetimeManager());
+            container.RegisterType<IPurchasingCompanyRepository, PurchasingCompanyRepository>(new TransientLifetimeManager());
+            container.RegisterType<IDelegateToAgentRepository, DelegateToAgentRepository>(new TransientLifetimeManager());
+
+            return container;
         }
     }
 }

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Properties/Resources.Designer.cs

@@ -0,0 +1,103 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     Этот код создан программой.
+//     Исполняемая версия:4.0.30319.42000
+//
+//     Изменения в этом файле могут привести к неправильной работе и будут потеряны в случае
+//     повторной генерации кода.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace TradeAndProcurementEnterprice.Properties {
+    using System;
+    
+    
+    /// <summary>
+    ///   Класс ресурса со строгой типизацией для поиска локализованных строк и т.д.
+    /// </summary>
+    // Этот класс создан автоматически классом StronglyTypedResourceBuilder
+    // с помощью такого средства, как ResGen или Visual Studio.
+    // Чтобы добавить или удалить член, измените файл .ResX и снова запустите ResGen
+    // с параметром /str или перестройте свой проект VS.
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "17.0.0.0")]
+    [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+    [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    internal class Resources {
+        
+        private static global::System.Resources.ResourceManager resourceMan;
+        
+        private static global::System.Globalization.CultureInfo resourceCulture;
+        
+        [global::System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        internal Resources() {
+        }
+        
+        /// <summary>
+        ///   Возвращает кэшированный экземпляр ResourceManager, использованный этим классом.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Resources.ResourceManager ResourceManager {
+            get {
+                if (object.ReferenceEquals(resourceMan, null)) {
+                    global::System.Resources.ResourceManager temp = new global::System.Resources.ResourceManager("TradeAndProcurementEnterprice.Properties.Resources", typeof(Resources).Assembly);
+                    resourceMan = temp;
+                }
+                return resourceMan;
+            }
+        }
+        
+        /// <summary>
+        ///   Перезаписывает свойство CurrentUICulture текущего потока для всех
+        ///   обращений к ресурсу с помощью этого класса ресурса со строгой типизацией.
+        /// </summary>
+        [global::System.ComponentModel.EditorBrowsableAttribute(global::System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static global::System.Globalization.CultureInfo Culture {
+            get {
+                return resourceCulture;
+            }
+            set {
+                resourceCulture = value;
+            }
+        }
+        
+        /// <summary>
+        ///   Поиск локализованного ресурса типа System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap add {
+            get {
+                object obj = ResourceManager.GetObject("add", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Поиск локализованного ресурса типа System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap edit {
+            get {
+                object obj = ResourceManager.GetObject("edit", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Поиск локализованного ресурса типа System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap photo_2024_12_03_21_34_38 {
+            get {
+                object obj = ResourceManager.GetObject("photo_2024-12-03_21-34-38", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Поиск локализованного ресурса типа System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap remove {
+            get {
+                object obj = ResourceManager.GetObject("remove", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Properties/Resources.resx

@@ -0,0 +1,133 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <assembly alias="System.Windows.Forms" name="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
+  <data name="photo_2024-12-03_21-34-38" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\photo_2024-12-03_21-34-38.jpg;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="add" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\add.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="remove" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\remove.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="edit" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\edit.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+</root>

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Repositories/IAgentsRepository.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TradeAndProcurementEnterprice.Entities;
+
+namespace TradeAndProcurementEnterprice.Repositories;
+
+public interface IAgentsRepository
+{
+    IEnumerable<Agent> ReadAgents();
+
+    Agent ReadAgentByID(int id);
+
+    void CreateAgent(Agent agent);
+
+    void UpdateAgent(Agent agent);
+
+    void DeleteAgent(int id);
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Repositories/IContractRepository.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TradeAndProcurementEnterprice.Entities;
+
+namespace TradeAndProcurementEnterprice.Repositories;
+
+public interface IContractRepository
+{
+    IEnumerable<Contract> ReadContracts(DateTime? dateFrom = null, DateTime? dateTo = null, 
+        int? productArticle = null, int? agentID = null, int? purchasingCompaniID = null);
+
+    void CreateContract(Contract contract);
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Repositories/IDelegateToAgentRepository.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TradeAndProcurementEnterprice.Entities;
+
+namespace TradeAndProcurementEnterprice.Repositories;
+
+public interface IDelegateToAgentRepository
+{
+    IEnumerable<DelegateToAgents> ReadDelegatesToAgent(DateTime? dateFrom = null, DateTime? dateTo = null,
+        int? productArticle = null, int? agentID = null);
+
+    void CreateDelegatesToAgent(DelegateToAgents delegateToAgents);
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Repositories/IProductRepository.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TradeAndProcurementEnterprice.Entities;
+
+namespace TradeAndProcurementEnterprice.Repositories;
+
+public interface IProductRepository
+{
+    IEnumerable<Product> ReadProducts();
+
+    Product ReadProductByArticle(int article);
+
+    void CreateProduct(Product product);
+
+    void UpdateProduct(Product product);
+
+    void DeleteProduct(int article);
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Repositories/IPurchasingCompanyRepository.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TradeAndProcurementEnterprice.Entities;
+
+namespace TradeAndProcurementEnterprice.Repositories;
+
+public interface IPurchasingCompanyRepository
+{
+    IEnumerable<PurchasingCompany> ReadCompanies();
+
+    PurchasingCompany ReadCompaniesByID(int id);
+
+    void CreateCompany(PurchasingCompany agent);
+
+    void UpdateCompanies(PurchasingCompany agent);
+
+    void DeleteCompany(int id);
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Repositories/Implementations/AgentsRepository.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TradeAndProcurementEnterprice.Entities;
+
+namespace TradeAndProcurementEnterprice.Repositories.Implementations;
+
+public class AgentsRepository : IAgentsRepository
+{
+    public void CreateAgent(Agent agent)
+    {
+    }
+
+    public void DeleteAgent(int id)
+    {
+    }
+
+    public Agent ReadAgentByID(int id)
+    {
+        return Agent.CreateEntity(0, string.Empty, Entities.Enums.Qualification.Junior, Entities.Enums.Category.Other);
+    }
+
+    public IEnumerable<Agent> ReadAgents()
+    {
+        return [];
+    }
+
+    public void UpdateAgent(Agent agent)
+    {
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Repositories/Implementations/ContractRepository.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TradeAndProcurementEnterprice.Entities;
+
+namespace TradeAndProcurementEnterprice.Repositories.Implementations;
+
+public class ContractRepository : IContractRepository
+{
+    public void CreateContract(Contract contract)
+    {
+    }
+
+    public IEnumerable<Contract> ReadContracts(DateTime? dateFrom = null, DateTime? dateTo = null, int? productArticle = null, int? agentID = null, int? purchasingCompaniID = null)
+    {
+        return [];
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Repositories/Implementations/DelegateToAgentRepository.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TradeAndProcurementEnterprice.Entities;
+
+namespace TradeAndProcurementEnterprice.Repositories.Implementations;
+
+public class DelegateToAgentRepository : IDelegateToAgentRepository
+{
+    public void CreateDelegatesToAgent(DelegateToAgents delegateToAgents)
+    {
+    }
+
+    public IEnumerable<DelegateToAgents> ReadDelegatesToAgent(DateTime? dateFrom = null, DateTime? dateTo = null, int? productArticle = null, int? agentID = null)
+    {
+        return [];
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Repositories/Implementations/ProductRepository.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TradeAndProcurementEnterprice.Entities;
+
+namespace TradeAndProcurementEnterprice.Repositories.Implementations;
+
+public class ProductRepository : IProductRepository
+{
+    public void CreateProduct(Product product)
+    {
+    }
+
+    public void DeleteProduct(int article)
+    {
+    }
+
+    public Product ReadProductByArticle(int article) 
+    {
+        return Product.CreateEntity(0, string.Empty, 0, Entities.Enums.Unit.Piece, Entities.Enums.Category.Other, 0);
+    }
+
+    public IEnumerable<Product> ReadProducts()
+    {
+        return [];
+    }
+
+    public void UpdateProduct(Product product)
+    {
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/Repositories/Implementations/PurchasingCompanyRepository.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using TradeAndProcurementEnterprice.Entities;
+
+namespace TradeAndProcurementEnterprice.Repositories.Implementations;
+
+public class PurchasingCompanyRepository : IPurchasingCompanyRepository
+{
+    public void CreateCompany(PurchasingCompany agent)
+    {
+    }
+
+    public void DeleteCompany(int id)
+    {
+    }
+
+    public IEnumerable<PurchasingCompany> ReadCompanies()
+    {
+        return [];
+    }
+
+    public PurchasingCompany ReadCompaniesByID(int id)
+    {
+        return PurchasingCompany.CreateEntity(0, string.Empty);
+    }
+
+    public void UpdateCompanies(PurchasingCompany agent)
+    {
+    }
+}

TradeAndProcurementEnterprice/TradeAndProcurementEnterprice/TradeAndProcurementEnterprice.csproj

@@ -6,6 +6,26 @@
     <Nullable>enable</Nullable>
     <UseWindowsForms>true</UseWindowsForms>
     <ImplicitUsings>enable</ImplicitUsings>
+	  <LangVersion>12.0</LangVersion>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Unity" Version="5.11.10" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Compile Update="Properties\Resources.Designer.cs">
+      <DesignTime>True</DesignTime>
+      <AutoGen>True</AutoGen>
+      <DependentUpon>Resources.resx</DependentUpon>
+    </Compile>
+  </ItemGroup>
+
+  <ItemGroup>
+    <EmbeddedResource Update="Properties\Resources.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+    </EmbeddedResource>
+  </ItemGroup>
+
 </Project>