ProjectGasStation/ProjectGasStation/Entities/Employee.cs

@@ -0,0 +1,22 @@
+using ProjectGasStation.Entities.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectGasStation.Entities;
+
+public class Employee
+{
+    public int Id { get; private set; }
+
+    public string Name { get; private set; } = string.Empty;
+
+    public EmployeePost EmployeePost { get; private set; }
+    
+    public static Employee CreateEntity(int id, string name, EmployeePost employeePost)
+    {
+        return new Employee { Id = id, Name = name ?? string.Empty, EmployeePost = employeePost };
+    }
+}

ProjectGasStation/ProjectGasStation/Entities/Enums/EmployeePost.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectGasStation.Entities.Enums;
+[Flags]
+public enum EmployeePost
+{
+    None = 0, 
+
+    Cashier = 1,
+
+    Fueler = 2, 
+
+    Manager = 4, 
+
+    Programmer = 8, 
+
+    Mechanic = 16 
+}

ProjectGasStation/ProjectGasStation/Entities/Enums/ProductType.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectGasStation.Entities.Enums;
+
+public enum ProductType
+{
+    None = 0,
+
+    Fuel = 1,
+
+    MotorOil = 2,
+
+    AutoChemicals = 3,
+
+    AutoParts = 4,
+
+    Tires = 5,
+}

ProjectGasStation/ProjectGasStation/Entities/Product.cs

@@ -0,0 +1,24 @@
+using ProjectGasStation.Entities.Enums;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectGasStation.Entities;
+
+public class Product
+{
+    public int Id { get; private set; }
+
+    public string Name { get; private set; } = string.Empty;
+
+    public double Price { get; private set; }  
+
+    public ProductType ProductType { get; private set; }
+
+    public static Product CreateEntity(int id, string name, double price, ProductType productType)
+    {
+        return new Product { Id = id, Name = name ?? string.Empty, Price = price, ProductType = productType };
+    }
+}

ProjectGasStation/ProjectGasStation/Entities/Purchase.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectGasStation.Entities;
+
+public class Purchase
+{
+    public int Id { get; private set; }
+    
+    public int ProductId { get; private set; }
+
+    public int SupplierId { get; private set; }
+
+    public double Quantity { get; private set; }
+
+    public DateTime PurchaseDate { get; private set; }
+
+    public double Price { get; private set; }
+
+    public static Purchase CreateOperation(int id, int productId, int supplierId, double quantity, DateTime purchaseDate, double price)
+    {
+        return new Purchase { Id = id, ProductId = productId, SupplierId = supplierId, Quantity = quantity, PurchaseDate = purchaseDate, Price = price };
+    }
+}

ProjectGasStation/ProjectGasStation/Entities/Sale.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectGasStation.Entities;
+
+public class Sale
+{
+    public int Id { get; private set; }
+    public int EmployeeId { get; private set; }
+    public DateTime SaleDate { get; private set;}
+
+    public IEnumerable<SaleProduct> SaleProducts { get; private set; } = [];
+    public static Sale CreateOperation(int id, int employeeId, DateTime saleDate, IEnumerable<SaleProduct> saleProducts)
+    {
+        return new Sale
+        {
+            Id = id,
+            EmployeeId = employeeId,
+            SaleDate = saleDate,
+            SaleProducts = saleProducts
+        };
+    }
+}

ProjectGasStation/ProjectGasStation/Entities/SaleProduct.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectGasStation.Entities;
+
+public class SaleProduct
+{
+    public int Id { get; private set; }
+    public int SaleID { get; private set; }
+    public int ProductID { get; private set;}
+    public double Quantity { get; private set; }
+
+
+
+    public static SaleProduct CreateOperation(int id, int saleID, int productID, double quantity)
+    {
+        return new SaleProduct() { Id = id, SaleID = saleID, ProductID = productID, Quantity = quantity };
+    }
+}

ProjectGasStation/ProjectGasStation/Entities/Supplier.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectGasStation.Entities;
+
+public class Supplier
+{
+    public int Id { get; private set; }
+
+    public string Name { get; private set; } = string.Empty;
+
+    public string INN { get; private set; } = string.Empty;
+
+    public static Supplier CreateEntity(int id, string name, string INN)
+    {
+        return new Supplier { Id = id, Name = name, INN = INN };
+    }
+}

ProjectGasStation/ProjectGasStation/Form1.Designer.cs

@@ -1,39 +0,0 @@
-namespace ProjectGasStation
-{
-    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
-    }
-}

ProjectGasStation/ProjectGasStation/Form1.cs

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

ProjectGasStation/ProjectGasStation/FormGasStation.Designer.cs

@@ -0,0 +1,148 @@
+namespace ProjectGasStation
+{
+    partial class FormGasStation
+    {
+        /// <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()
+        {
+            components = new System.ComponentModel.Container();
+            contextMenuStrip = new ContextMenuStrip(components);
+            menuStrip1 = new MenuStrip();
+            справочникиToolStripMenuItem = new ToolStripMenuItem();
+            EmployeeToolStripMenuItem = new ToolStripMenuItem();
+            ProductToolStripMenuItem = new ToolStripMenuItem();
+            SupplierToolStripMenuItem = new ToolStripMenuItem();
+            операцииToolStripMenuItem = new ToolStripMenuItem();
+            SaleToolStripMenuItem = new ToolStripMenuItem();
+            PurchaseToolStripMenuItem = new ToolStripMenuItem();
+            отчетыToolStripMenuItem = new ToolStripMenuItem();
+            menuStrip1.SuspendLayout();
+            SuspendLayout();
+            // 
+            // contextMenuStrip
+            // 
+            contextMenuStrip.ImageScalingSize = new Size(18, 18);
+            contextMenuStrip.Name = "contextMenuStrip";
+            contextMenuStrip.Size = new Size(61, 4);
+            // 
+            // menuStrip1
+            // 
+            menuStrip1.ImageScalingSize = new Size(18, 18);
+            menuStrip1.Items.AddRange(new ToolStripItem[] { справочникиToolStripMenuItem, операцииToolStripMenuItem, отчетыToolStripMenuItem });
+            menuStrip1.Location = new Point(0, 0);
+            menuStrip1.Name = "menuStrip1";
+            menuStrip1.Size = new Size(784, 25);
+            menuStrip1.TabIndex = 1;
+            menuStrip1.Text = "menuStrip1";
+            // 
+            // справочникиToolStripMenuItem
+            // 
+            справочникиToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { EmployeeToolStripMenuItem, ProductToolStripMenuItem, SupplierToolStripMenuItem });
+            справочникиToolStripMenuItem.Name = "справочникиToolStripMenuItem";
+            справочникиToolStripMenuItem.Size = new Size(99, 21);
+            справочникиToolStripMenuItem.Text = "Справочники";
+            // 
+            // EmployeeToolStripMenuItem
+            // 
+            EmployeeToolStripMenuItem.Name = "EmployeeToolStripMenuItem";
+            EmployeeToolStripMenuItem.Size = new Size(198, 24);
+            EmployeeToolStripMenuItem.Text = "Сотрудники";
+            EmployeeToolStripMenuItem.Click += EmployeeToolStripMenuItem_Click;
+            // 
+            // ProductToolStripMenuItem
+            // 
+            ProductToolStripMenuItem.Name = "ProductToolStripMenuItem";
+            ProductToolStripMenuItem.Size = new Size(198, 24);
+            ProductToolStripMenuItem.Text = "Товары";
+            ProductToolStripMenuItem.Click += ProductToolStripMenuItem_Click;
+            // 
+            // SupplierToolStripMenuItem
+            // 
+            SupplierToolStripMenuItem.Name = "SupplierToolStripMenuItem";
+            SupplierToolStripMenuItem.Size = new Size(198, 24);
+            SupplierToolStripMenuItem.Text = "Поставщики";
+            SupplierToolStripMenuItem.Click += SupplierToolStripMenuItem_Click;
+            // 
+            // операцииToolStripMenuItem
+            // 
+            операцииToolStripMenuItem.DropDownItems.AddRange(new ToolStripItem[] { SaleToolStripMenuItem, PurchaseToolStripMenuItem });
+            операцииToolStripMenuItem.Name = "операцииToolStripMenuItem";
+            операцииToolStripMenuItem.Size = new Size(80, 21);
+            операцииToolStripMenuItem.Text = "Операции";
+            // 
+            // SaleToolStripMenuItem
+            // 
+            SaleToolStripMenuItem.Name = "SaleToolStripMenuItem";
+            SaleToolStripMenuItem.Size = new Size(198, 24);
+            SaleToolStripMenuItem.Text = "Продажа";
+            SaleToolStripMenuItem.Click += SaleToolStripMenuItem_Click;
+            // 
+            // PurchaseToolStripMenuItem
+            // 
+            PurchaseToolStripMenuItem.Name = "PurchaseToolStripMenuItem";
+            PurchaseToolStripMenuItem.Size = new Size(198, 24);
+            PurchaseToolStripMenuItem.Text = "Закупка";
+            PurchaseToolStripMenuItem.Click += PurchaseToolStripMenuItem_Click;
+            // 
+            // отчетыToolStripMenuItem
+            // 
+            отчетыToolStripMenuItem.Name = "отчетыToolStripMenuItem";
+            отчетыToolStripMenuItem.Size = new Size(63, 21);
+            отчетыToolStripMenuItem.Text = "Отчеты";
+            // 
+            // FormGasStation
+            // 
+            AutoScaleDimensions = new SizeF(7F, 17F);
+            AutoScaleMode = AutoScaleMode.Font;
+            BackgroundImage = Properties.Resources.Union_76_Gas_Station;
+            BackgroundImageLayout = ImageLayout.Stretch;
+            ClientSize = new Size(784, 409);
+            Controls.Add(menuStrip1);
+            MainMenuStrip = menuStrip1;
+            Name = "FormGasStation";
+            StartPosition = FormStartPosition.CenterScreen;
+            Text = "Заправочная станция";
+            menuStrip1.ResumeLayout(false);
+            menuStrip1.PerformLayout();
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+
+        private ContextMenuStrip contextMenuStrip;
+        private MenuStrip menuStrip1;
+        private ToolStripMenuItem справочникиToolStripMenuItem;
+        private ToolStripMenuItem операцииToolStripMenuItem;
+        private ToolStripMenuItem отчетыToolStripMenuItem;
+        private ToolStripMenuItem EmployeeToolStripMenuItem;
+        private ToolStripMenuItem ProductToolStripMenuItem;
+        private ToolStripMenuItem сменыToolStripMenuItem;
+        private ToolStripMenuItem SupplierToolStripMenuItem;
+        private ToolStripMenuItem SaleToolStripMenuItem;
+        private ToolStripMenuItem PurchaseToolStripMenuItem;
+    }
+}

ProjectGasStation/ProjectGasStation/FormGasStation.cs

@@ -0,0 +1,74 @@
+using ProjectGasStation.Forms;
+using Unity;
+
+namespace ProjectGasStation;
+
+public partial class FormGasStation : Form
+{
+    private readonly IUnityContainer _container;
+    public FormGasStation(IUnityContainer container)
+    {
+        InitializeComponent();
+        _container = container ?? throw new ArgumentNullException(nameof(container));
+    }
+
+    private void EmployeeToolStripMenuItem_Click(object sender, EventArgs e)
+    {
+        try
+        {
+            _container.Resolve<FormEmployees>().ShowDialog();
+        }
+        catch (Exception ex)
+        {
+            MessageBox.Show(ex.Message, "Îøèáêà ïðè çàãðóçêå", MessageBoxButtons.OK, MessageBoxIcon.Error);
+        }
+    }
+
+    private void ProductToolStripMenuItem_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 SupplierToolStripMenuItem_Click(object sender, EventArgs e)
+    {
+        try
+        {
+            _container.Resolve<FormSuppliers>().ShowDialog();
+        }
+        catch (Exception ex)
+        {
+            MessageBox.Show(ex.Message, "Îøèáêà ïðè çàãðóçêå", MessageBoxButtons.OK, MessageBoxIcon.Error);
+        }
+    }
+
+    private void PurchaseToolStripMenuItem_Click(object sender, EventArgs e)
+    {
+        try
+        {
+            _container.Resolve<FormPurchases>().ShowDialog();
+        }
+        catch (Exception ex)
+        {
+            MessageBox.Show(ex.Message, "Îøèáêà ïðè çàãðóçêå", MessageBoxButtons.OK, MessageBoxIcon.Error);
+        }
+    }
+
+    private void SaleToolStripMenuItem_Click(object sender, EventArgs e)
+    {
+        try
+        {
+            _container.Resolve<FormSales>().ShowDialog();
+        }
+        catch (Exception ex)
+        {
+            MessageBox.Show(ex.Message, "Îøèáêà ïðè çàãðóçêå", MessageBoxButtons.OK, MessageBoxIcon.Error);
+        }
+    }
+}

ProjectGasStation/ProjectGasStation/FormGasStation.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="contextMenuStrip.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+    <value>17, 17</value>
+  </metadata>
+  <metadata name="menuStrip1.TrayLocation" type="System.Drawing.Point, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a">
+    <value>176, 17</value>
+  </metadata>
+</root>

ProjectGasStation/ProjectGasStation/Forms/FormEmployee.Designer.cs

@@ -0,0 +1,117 @@
+namespace ProjectGasStation.Forms
+{
+    partial class FormEmployee
+    {
+        /// <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()
+        {
+            labelName = new Label();
+            label2 = new Label();
+            textBoxName = new TextBox();
+            checkedListBoxType = new CheckedListBox();
+            buttonAdd = new Button();
+            buttonCancel = new Button();
+            SuspendLayout();
+            // 
+            // labelName
+            // 
+            labelName.AutoSize = true;
+            labelName.Location = new Point(52, 65);
+            labelName.Name = "labelName";
+            labelName.Size = new Size(34, 17);
+            labelName.TabIndex = 0;
+            labelName.Text = "Имя";
+            // 
+            // label2
+            // 
+            label2.AutoSize = true;
+            label2.Location = new Point(21, 155);
+            label2.Name = "label2";
+            label2.Size = new Size(74, 17);
+            label2.TabIndex = 1;
+            label2.Text = "Должность";
+            // 
+            // textBoxName
+            // 
+            textBoxName.Location = new Point(110, 62);
+            textBoxName.Name = "textBoxName";
+            textBoxName.Size = new Size(150, 25);
+            textBoxName.TabIndex = 2;
+            // 
+            // checkedListBoxType
+            // 
+            checkedListBoxType.FormattingEnabled = true;
+            checkedListBoxType.Location = new Point(110, 155);
+            checkedListBoxType.Name = "checkedListBoxType";
+            checkedListBoxType.Size = new Size(150, 104);
+            checkedListBoxType.TabIndex = 3;
+            // 
+            // buttonAdd
+            // 
+            buttonAdd.Location = new Point(52, 336);
+            buttonAdd.Name = "buttonAdd";
+            buttonAdd.Size = new Size(114, 40);
+            buttonAdd.TabIndex = 4;
+            buttonAdd.Text = "Добавить";
+            buttonAdd.UseVisualStyleBackColor = true;
+            buttonAdd.Click += this.buttonAdd_Click;
+            // 
+            // buttonCancel
+            // 
+            buttonCancel.Location = new Point(227, 336);
+            buttonCancel.Name = "buttonCancel";
+            buttonCancel.Size = new Size(112, 40);
+            buttonCancel.TabIndex = 5;
+            buttonCancel.Text = "Отмена";
+            buttonCancel.UseVisualStyleBackColor = true;
+            // 
+            // FormEmployee
+            // 
+            AutoScaleDimensions = new SizeF(7F, 17F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(415, 408);
+            Controls.Add(buttonCancel);
+            Controls.Add(buttonAdd);
+            Controls.Add(checkedListBoxType);
+            Controls.Add(textBoxName);
+            Controls.Add(label2);
+            Controls.Add(labelName);
+            Name = "FormEmployee";
+            Text = "Employee";
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+
+        private Label labelName;
+        private Label label2;
+        private TextBox textBoxName;
+        private CheckedListBox checkedListBoxType;
+        private Button buttonAdd;
+        private Button buttonCancel;
+    }
+}

ProjectGasStation/ProjectGasStation/Forms/FormEmployee.cs

@@ -0,0 +1,101 @@
+using ProjectGasStation.Entities;
+using ProjectGasStation.Entities.Enums;
+using ProjectGasStation.Implementations;
+using ProjectGasStation.Repositories;
+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;
+
+namespace ProjectGasStation.Forms
+{
+    public partial class FormEmployee : Form
+    {
+        private readonly IEmployeeRepository _employeeRepository;
+        private int? _employeeId;
+
+        public int Id
+        {
+            set
+            {
+                try
+                {
+                    var employee = _employeeRepository.ReadEmployeeById(value);
+                    if (employee == null)
+                    {
+                        throw new
+                        InvalidDataException(nameof(employee));
+                    }
+                    foreach (EmployeePost elem in Enum.GetValues(typeof(EmployeePost)))
+                    {
+                        if ((elem & employee.EmployeePost) != 0)
+                        {
+                            checkedListBoxType.SetItemChecked(checkedListBoxType.Items.IndexOf(elem), true);
+                        }
+                    }
+                    textBoxName.Text = employee.Name;
+                    _employeeId = value;
+
+                }
+                catch (Exception ex) 
+                {
+                    MessageBox.Show(ex.Message, "Ошибка при получении данных", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                    return;
+                }
+            }
+        }
+        public FormEmployee(IEmployeeRepository employeeRepository)
+        {
+            InitializeComponent();
+            _employeeRepository = employeeRepository ?? throw new ArgumentNullException(nameof(employeeRepository));
+
+            foreach(var elem in Enum.GetValues(typeof(EmployeePost)))
+            {
+                checkedListBoxType.Items.Add(elem);
+            }
+        }
+        
+        private void buttonAdd_Click(object sender, EventArgs e) 
+        {
+            try
+            {
+                if (checkedListBoxType.CheckedItems.Count == 0 ||
+                string.IsNullOrWhiteSpace(textBoxName.Text))
+                {
+                    throw new Exception("Имеются незаполненные поля");
+                }
+                if (_employeeId.HasValue)  
+                {
+                    _employeeRepository.UpdateEmployee(CreateEmployee(_employeeId.Value));
+                }
+                else
+                {
+                    _employeeRepository.CreateEmployee(CreateEmployee(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 Employee CreateEmployee(int id)
+        {
+            EmployeePost employeePost = EmployeePost.None;
+            foreach (var elem in checkedListBoxType.CheckedItems) 
+            {
+                employeePost |= (EmployeePost)elem;
+            }
+
+            return Employee.CreateEntity(id, textBoxName.Text, employeePost);
+        }
+    }
+}

ProjectGasStation/ProjectGasStation/Forms/FormEmployee.resx

@@ -1,17 +1,17 @@
 <?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 
+
+    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>
@@ -26,36 +26,36 @@
         <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 
+
+    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 
+
+    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 
+
+    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 
+
+    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 
+    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 
+    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 
+    value   : The object must be serialized into a byte array
             : using a System.ComponentModel.TypeConverter
             : and then encoded with base64 encoding.
     -->

ProjectGasStation/ProjectGasStation/Forms/FormEmployees.Designer.cs

@@ -0,0 +1,117 @@
+namespace ProjectGasStation.Forms
+{
+    partial class FormEmployees
+    {
+        /// <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()
+        {
+            dataGridView = new DataGridView();
+            panel1 = new Panel();
+            buttonUpdate = new Button();
+            buttonRemove = new Button();
+            buttonAdd = new Button();
+            ((System.ComponentModel.ISupportInitialize)dataGridView).BeginInit();
+            panel1.SuspendLayout();
+            SuspendLayout();
+            // 
+            // dataGridView
+            // 
+            dataGridView.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            dataGridView.Dock = DockStyle.Fill;
+            dataGridView.Location = new Point(0, 0);
+            dataGridView.Name = "dataGridView";
+            dataGridView.RowHeadersWidth = 45;
+            dataGridView.Size = new Size(800, 450);
+            dataGridView.TabIndex = 0;
+            // 
+            // panel1
+            // 
+            panel1.Controls.Add(buttonUpdate);
+            panel1.Controls.Add(buttonRemove);
+            panel1.Controls.Add(buttonAdd);
+            panel1.Dock = DockStyle.Right;
+            panel1.Location = new Point(645, 0);
+            panel1.Name = "panel1";
+            panel1.Size = new Size(155, 450);
+            panel1.TabIndex = 1;
+            // 
+            // buttonUpdate
+            // 
+            buttonUpdate.BackgroundImage = Properties.Resources.edit;
+            buttonUpdate.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonUpdate.Location = new Point(35, 300);
+            buttonUpdate.Name = "buttonUpdate";
+            buttonUpdate.Size = new Size(83, 75);
+            buttonUpdate.TabIndex = 2;
+            buttonUpdate.UseVisualStyleBackColor = true;
+            buttonUpdate.Click += buttonUpdate_Click;
+            // 
+            // buttonRemove
+            // 
+            buttonRemove.BackgroundImage = Properties.Resources.minus;
+            buttonRemove.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonRemove.Location = new Point(35, 171);
+            buttonRemove.Name = "buttonRemove";
+            buttonRemove.Size = new Size(83, 75);
+            buttonRemove.TabIndex = 1;
+            buttonRemove.UseVisualStyleBackColor = true;
+            buttonRemove.Click += buttonRemove_Click;
+            // 
+            // buttonAdd
+            // 
+            buttonAdd.BackgroundImage = Properties.Resources.plus1;
+            buttonAdd.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonAdd.Location = new Point(35, 47);
+            buttonAdd.Name = "buttonAdd";
+            buttonAdd.Size = new Size(83, 75);
+            buttonAdd.TabIndex = 0;
+            buttonAdd.UseVisualStyleBackColor = true;
+            buttonAdd.Click += buttonAdd_Click;
+            // 
+            // FormEmployees
+            // 
+            AutoScaleDimensions = new SizeF(7F, 17F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(800, 450);
+            Controls.Add(panel1);
+            Controls.Add(dataGridView);
+            Name = "FormEmployees";
+            Text = "FormEmployees";
+            ((System.ComponentModel.ISupportInitialize)dataGridView).EndInit();
+            panel1.ResumeLayout(false);
+            ResumeLayout(false);
+            Load += FormEmployees_Load;
+        }
+
+        #endregion
+
+        private DataGridView dataGridView;
+        private Panel panel1;
+        private Button buttonUpdate;
+        private Button buttonRemove;
+        private Button buttonAdd;
+    }
+}

ProjectGasStation/ProjectGasStation/Forms/FormEmployees.cs

@@ -0,0 +1,118 @@
+using ProjectGasStation.Entities.Enums;
+using ProjectGasStation.Repositories;
+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 Unity;
+
+namespace ProjectGasStation.Forms
+{
+    public partial class FormEmployees : Form
+    {
+        private readonly IUnityContainer _container;
+        private readonly IEmployeeRepository _employeeRepository;
+
+        
+        public FormEmployees(IUnityContainer container, IEmployeeRepository employeeRepository)
+        {
+            InitializeComponent();
+            _container = container ??
+            throw new
+            ArgumentNullException(nameof(container));
+            _employeeRepository = employeeRepository ??
+            throw new ArgumentNullException(nameof(employeeRepository));
+        }
+
+        private void FormEmployees_Load(object sender, EventArgs e)
+        {
+            try
+            {
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при загрузке",
+                MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void LoadList() => dataGridView.DataSource =
+        _employeeRepository.ReadEmployees();
+        private bool TryGetIdentifierFromSelectedRow(out int id)
+        {
+            id = 0;
+            if (dataGridView.SelectedRows.Count < 1)
+            {
+                MessageBox.Show("Нет выбранной записи", "Ошибка",
+                MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return false;
+            }
+            id =
+            Convert.ToInt32(dataGridView.SelectedRows[0].Cells["Id"].Value);
+            return true;
+        }
+
+        private void buttonAdd_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                _container.Resolve<FormEmployee>().ShowDialog();
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при добавлении",
+                MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void buttonRemove_Click(object sender, EventArgs e)
+        {
+            if (!TryGetIdentifierFromSelectedRow(out var findId))
+            {
+                return;
+            }
+            if (MessageBox.Show("Удалить запись?", "Удаление",
+            MessageBoxButtons.YesNo) != DialogResult.Yes)
+            {
+                return;
+            }
+            try
+            {
+                _employeeRepository.DeleteEmployee(findId);
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при удалении",
+                MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void buttonUpdate_Click(object sender, EventArgs e)
+        {
+            if (!TryGetIdentifierFromSelectedRow(out var findId))
+            {
+                return;
+            }
+            try
+            {
+                var form = _container.Resolve<FormEmployee>();
+                form.Id = findId;
+                form.ShowDialog();
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при изменении",
+                MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+    }
+}

ProjectGasStation/ProjectGasStation/Forms/FormEmployees.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>

ProjectGasStation/ProjectGasStation/Forms/FormProduct.Designer.cs

@@ -0,0 +1,146 @@
+namespace ProjectGasStation.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()
+        {
+            labelName = new Label();
+            labelPrice = new Label();
+            labelProductType = new Label();
+            textBoxProductName = new TextBox();
+            numericUpDownProductPrice = new NumericUpDown();
+            buttonSave = new Button();
+            buttonCancel = new Button();
+            comboBoxProductType = new ComboBox();
+            ((System.ComponentModel.ISupportInitialize)numericUpDownProductPrice).BeginInit();
+            SuspendLayout();
+            // 
+            // labelName
+            // 
+            labelName.AutoSize = true;
+            labelName.Location = new Point(26, 35);
+            labelName.Name = "labelName";
+            labelName.Size = new Size(111, 17);
+            labelName.TabIndex = 0;
+            labelName.Text = "Название товара";
+            // 
+            // labelPrice
+            // 
+            labelPrice.AutoSize = true;
+            labelPrice.Location = new Point(26, 88);
+            labelPrice.Name = "labelPrice";
+            labelPrice.Size = new Size(108, 17);
+            labelPrice.TabIndex = 1;
+            labelPrice.Text = "Цена за единицу";
+            // 
+            // labelProductType
+            // 
+            labelProductType.AutoSize = true;
+            labelProductType.Location = new Point(26, 139);
+            labelProductType.Name = "labelProductType";
+            labelProductType.Size = new Size(75, 17);
+            labelProductType.TabIndex = 2;
+            labelProductType.Text = "Тип товара";
+            // 
+            // textBoxProductName
+            // 
+            textBoxProductName.Location = new Point(140, 35);
+            textBoxProductName.Name = "textBoxProductName";
+            textBoxProductName.Size = new Size(100, 25);
+            textBoxProductName.TabIndex = 3;
+            // 
+            // numericUpDownProductPrice
+            // 
+            numericUpDownProductPrice.DecimalPlaces = 3;
+            numericUpDownProductPrice.Location = new Point(140, 88);
+            numericUpDownProductPrice.Minimum = new decimal(new int[] { 1, 0, 0, 196608 });
+            numericUpDownProductPrice.Name = "numericUpDownProductPrice";
+            numericUpDownProductPrice.Size = new Size(120, 25);
+            numericUpDownProductPrice.TabIndex = 5;
+            numericUpDownProductPrice.Value = new decimal(new int[] { 1, 0, 0, 196608 });
+            // 
+            // buttonSave
+            // 
+            buttonSave.Location = new Point(41, 258);
+            buttonSave.Name = "buttonSave";
+            buttonSave.Size = new Size(108, 41);
+            buttonSave.TabIndex = 6;
+            buttonSave.Text = "Сохранить";
+            buttonSave.UseVisualStyleBackColor = true;
+            buttonSave.Click += buttonSave_Click;
+            // 
+            // buttonCancel
+            // 
+            buttonCancel.Location = new Point(203, 258);
+            buttonCancel.Name = "buttonCancel";
+            buttonCancel.Size = new Size(116, 41);
+            buttonCancel.TabIndex = 7;
+            buttonCancel.Text = "Отмена";
+            buttonCancel.UseVisualStyleBackColor = true;
+            buttonCancel.Click += buttonCancel_Click;
+            // 
+            // comboBoxProductType
+            // 
+            comboBoxProductType.DropDownStyle = ComboBoxStyle.DropDownList;
+            comboBoxProductType.FormattingEnabled = true;
+            comboBoxProductType.Location = new Point(139, 136);
+            comboBoxProductType.Name = "comboBoxProductType";
+            comboBoxProductType.Size = new Size(121, 25);
+            comboBoxProductType.TabIndex = 8;
+            // 
+            // FormProduct
+            // 
+            AutoScaleDimensions = new SizeF(7F, 17F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(358, 335);
+            Controls.Add(comboBoxProductType);
+            Controls.Add(buttonCancel);
+            Controls.Add(buttonSave);
+            Controls.Add(numericUpDownProductPrice);
+            Controls.Add(textBoxProductName);
+            Controls.Add(labelProductType);
+            Controls.Add(labelPrice);
+            Controls.Add(labelName);
+            Name = "FormProduct";
+            Text = "Товар";
+            ((System.ComponentModel.ISupportInitialize)numericUpDownProductPrice).EndInit();
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+
+        private Label labelName;
+        private Label labelPrice;
+        private Label labelProductType;
+        private TextBox textBoxProductName;
+        private NumericUpDown numericUpDownProductPrice;
+        private Button buttonSave;
+        private Button buttonCancel;
+        private ComboBox comboBoxProductType;
+    }
+}

ProjectGasStation/ProjectGasStation/Forms/FormProduct.cs

@@ -0,0 +1,94 @@
+using ProjectGasStation.Entities;
+using ProjectGasStation.Entities.Enums;
+using ProjectGasStation.Implementations;
+using ProjectGasStation.Repositories;
+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;
+
+namespace ProjectGasStation.Forms
+{
+    public partial class FormProduct : Form
+    {
+
+        private readonly IProductRepository _productRepository;
+
+        private int? _productId;
+
+        public int Id
+        {
+            set
+            {
+                try
+                {
+                    var product = _productRepository.ReadProductById(value);
+                    if (product == null)
+                    {
+                        throw new InvalidDataException(nameof(product));
+                    }
+
+                    textBoxProductName.Text = product.Name;
+                    numericUpDownProductPrice.Value = (decimal)product.Price;
+                    comboBoxProductType.SelectedItem = product.ProductType;
+                    _productId = 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));
+
+            comboBoxProductType.DataSource = Enum.GetValues(typeof(ProductType));
+        }
+
+
+
+        private void buttonSave_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                if (string.IsNullOrWhiteSpace(textBoxProductName.Text) || comboBoxProductType.SelectedIndex < 1)
+                {
+                    throw new Exception("Имеются незаполненные поля");
+                }
+                if (_productId.HasValue)
+                {
+                    _productRepository.UpdateProduct(CreateProduct(_productId.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 id) => Product.CreateEntity(id, textBoxProductName.Text, (double)numericUpDownProductPrice.Value, (ProductType)comboBoxProductType.SelectedItem!);
+    }
+}

ProjectGasStation/ProjectGasStation/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>

ProjectGasStation/ProjectGasStation/Forms/FormProducts.Designer.cs

@@ -0,0 +1,117 @@
+namespace ProjectGasStation.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();
+            buttonUpdate = new Button();
+            buttonDel = new Button();
+            buttonAdd = new Button();
+            dataGridView = new DataGridView();
+            panel1.SuspendLayout();
+            ((System.ComponentModel.ISupportInitialize)dataGridView).BeginInit();
+            SuspendLayout();
+            // 
+            // panel1
+            // 
+            panel1.Controls.Add(buttonUpdate);
+            panel1.Controls.Add(buttonDel);
+            panel1.Controls.Add(buttonAdd);
+            panel1.Dock = DockStyle.Right;
+            panel1.Location = new Point(630, 0);
+            panel1.Name = "panel1";
+            panel1.Size = new Size(170, 450);
+            panel1.TabIndex = 0;
+            // 
+            // buttonUpdate
+            // 
+            buttonUpdate.BackgroundImage = Properties.Resources.edit;
+            buttonUpdate.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonUpdate.Location = new Point(40, 309);
+            buttonUpdate.Name = "buttonUpdate";
+            buttonUpdate.Size = new Size(83, 73);
+            buttonUpdate.TabIndex = 2;
+            buttonUpdate.UseVisualStyleBackColor = true;
+            buttonUpdate.Click += buttonUpdate_Click;
+            // 
+            // buttonDel
+            // 
+            buttonDel.BackgroundImage = Properties.Resources.minus;
+            buttonDel.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonDel.Location = new Point(40, 186);
+            buttonDel.Name = "buttonDel";
+            buttonDel.Size = new Size(83, 73);
+            buttonDel.TabIndex = 1;
+            buttonDel.UseVisualStyleBackColor = true;
+            buttonDel.Click += buttonDel_Click;
+            // 
+            // buttonAdd
+            // 
+            buttonAdd.BackgroundImage = Properties.Resources.plus1;
+            buttonAdd.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonAdd.Location = new Point(40, 52);
+            buttonAdd.Name = "buttonAdd";
+            buttonAdd.Size = new Size(83, 73);
+            buttonAdd.TabIndex = 0;
+            buttonAdd.UseVisualStyleBackColor = true;
+            buttonAdd.Click += buttonAdd_Click;
+            // 
+            // dataGridView
+            // 
+            dataGridView.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            dataGridView.Dock = DockStyle.Fill;
+            dataGridView.Location = new Point(0, 0);
+            dataGridView.Name = "dataGridView";
+            dataGridView.RowHeadersWidth = 45;
+            dataGridView.Size = new Size(630, 450);
+            dataGridView.TabIndex = 1;
+            // 
+            // FormProducts
+            // 
+            AutoScaleDimensions = new SizeF(7F, 17F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(800, 450);
+            Controls.Add(dataGridView);
+            Controls.Add(panel1);
+            Name = "FormProducts";
+            Text = "FormProducts";
+            panel1.ResumeLayout(false);
+            ((System.ComponentModel.ISupportInitialize)dataGridView).EndInit();
+            ResumeLayout(false);
+            Load += FormProducts_Load;
+        }
+
+        #endregion
+
+        private Panel panel1;
+        private Button buttonUpdate;
+        private Button buttonDel;
+        private Button buttonAdd;
+        private DataGridView dataGridView;
+    }
+}

ProjectGasStation/ProjectGasStation/Forms/FormProducts.cs

@@ -0,0 +1,116 @@
+using ProjectGasStation.Implementations;
+using ProjectGasStation.Repositories;
+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 Unity;
+
+namespace ProjectGasStation.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 LoadList() => dataGridView.DataSource = _productRepository.ReadProducts();
+
+        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 buttonUpdate_Click(object sender, EventArgs e)
+        {
+            if (!TryGetIdentifierFromSelectedRow(out var findId))
+            {
+                return;
+            }
+            try
+            {
+                var form = _container.Resolve<FormProduct>();
+                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 (!TryGetIdentifierFromSelectedRow(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 bool TryGetIdentifierFromSelectedRow(out int id)
+        {
+            id = 0;
+            if (dataGridView.SelectedRows.Count < 1)
+            {
+                MessageBox.Show("Нет выбранной записи", "Ошибка",
+                MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return false;
+            }
+            id =
+            Convert.ToInt32(dataGridView.SelectedRows[0].Cells["Id"].Value);
+            return true;
+        }
+    }
+}

ProjectGasStation/ProjectGasStation/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>

ProjectGasStation/ProjectGasStation/Forms/FormPurchase.Designer.cs

@@ -0,0 +1,196 @@
+namespace ProjectGasStation.Forms
+{
+    partial class FormPurchase
+    {
+        /// <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()
+        {
+            labelProduct = new Label();
+            labelSupplier = new Label();
+            labelQuantity = new Label();
+            dateTimePicker1 = new DateTimePicker();
+            labelDate = new Label();
+            labelPrice = new Label();
+            numericUpDown1 = new NumericUpDown();
+            numericUpDown2 = new NumericUpDown();
+            comboBoxProduct = new ComboBox();
+            comboBoxSupplier = new ComboBox();
+            buttonAdd = new Button();
+            buttonCancel = new Button();
+            ((System.ComponentModel.ISupportInitialize)numericUpDown1).BeginInit();
+            ((System.ComponentModel.ISupportInitialize)numericUpDown2).BeginInit();
+            SuspendLayout();
+            // 
+            // labelProduct
+            // 
+            labelProduct.AutoSize = true;
+            labelProduct.Location = new Point(44, 39);
+            labelProduct.Name = "labelProduct";
+            labelProduct.Size = new Size(45, 17);
+            labelProduct.TabIndex = 0;
+            labelProduct.Text = "Товар";
+            // 
+            // labelSupplier
+            // 
+            labelSupplier.AutoSize = true;
+            labelSupplier.Location = new Point(46, 96);
+            labelSupplier.Name = "labelSupplier";
+            labelSupplier.Size = new Size(74, 17);
+            labelSupplier.TabIndex = 1;
+            labelSupplier.Text = "Поставщик";
+            // 
+            // labelQuantity
+            // 
+            labelQuantity.AutoSize = true;
+            labelQuantity.Location = new Point(46, 144);
+            labelQuantity.Name = "labelQuantity";
+            labelQuantity.Size = new Size(82, 17);
+            labelQuantity.TabIndex = 2;
+            labelQuantity.Text = "Количество ";
+            // 
+            // dateTimePicker1
+            // 
+            dateTimePicker1.Location = new Point(147, 242);
+            dateTimePicker1.Name = "dateTimePicker1";
+            dateTimePicker1.Size = new Size(221, 25);
+            dateTimePicker1.TabIndex = 3;
+            dateTimePicker1.ValueChanged += dateTimePicker1_ValueChanged;
+            // 
+            // labelDate
+            // 
+            labelDate.AutoSize = true;
+            labelDate.Location = new Point(44, 242);
+            labelDate.Name = "labelDate";
+            labelDate.Size = new Size(36, 17);
+            labelDate.TabIndex = 4;
+            labelDate.Text = "Дата";
+            // 
+            // labelPrice
+            // 
+            labelPrice.AutoSize = true;
+            labelPrice.Location = new Point(46, 197);
+            labelPrice.Name = "labelPrice";
+            labelPrice.Size = new Size(39, 17);
+            labelPrice.TabIndex = 5;
+            labelPrice.Text = "Цена";
+            // 
+            // numericUpDown1
+            // 
+            numericUpDown1.DecimalPlaces = 2;
+            numericUpDown1.Location = new Point(147, 197);
+            numericUpDown1.Minimum = new decimal(new int[] { 1, 0, 0, 131072 });
+            numericUpDown1.Name = "numericUpDown1";
+            numericUpDown1.Size = new Size(132, 25);
+            numericUpDown1.TabIndex = 6;
+            numericUpDown1.Value = new decimal(new int[] { 1, 0, 0, 131072 });
+            // 
+            // numericUpDown2
+            // 
+            numericUpDown2.DecimalPlaces = 3;
+            numericUpDown2.Location = new Point(147, 144);
+            numericUpDown2.Minimum = new decimal(new int[] { 1, 0, 0, 196608 });
+            numericUpDown2.Name = "numericUpDown2";
+            numericUpDown2.Size = new Size(132, 25);
+            numericUpDown2.TabIndex = 7;
+            numericUpDown2.Value = new decimal(new int[] { 1, 0, 0, 196608 });
+            // 
+            // comboBoxProduct
+            // 
+            comboBoxProduct.FormattingEnabled = true;
+            comboBoxProduct.Location = new Point(147, 39);
+            comboBoxProduct.Name = "comboBoxProduct";
+            comboBoxProduct.Size = new Size(134, 25);
+            comboBoxProduct.TabIndex = 8;
+            // 
+            // comboBoxSupplier
+            // 
+            comboBoxSupplier.FormattingEnabled = true;
+            comboBoxSupplier.Location = new Point(147, 96);
+            comboBoxSupplier.Name = "comboBoxSupplier";
+            comboBoxSupplier.Size = new Size(134, 25);
+            comboBoxSupplier.TabIndex = 9;
+            // 
+            // buttonAdd
+            // 
+            buttonAdd.Location = new Point(45, 388);
+            buttonAdd.Name = "buttonAdd";
+            buttonAdd.Size = new Size(123, 42);
+            buttonAdd.TabIndex = 10;
+            buttonAdd.Text = "Добавить";
+            buttonAdd.UseVisualStyleBackColor = true;
+            buttonAdd.Click += this.buttonAdd_Click;
+            // 
+            // buttonCancel
+            // 
+            buttonCancel.Location = new Point(227, 388);
+            buttonCancel.Name = "buttonCancel";
+            buttonCancel.Size = new Size(115, 42);
+            buttonCancel.TabIndex = 11;
+            buttonCancel.Text = "Отмена";
+            buttonCancel.UseVisualStyleBackColor = true;
+            buttonCancel.Click += this.buttonCancel_Click;
+            // 
+            // FormPurchase
+            // 
+            AutoScaleDimensions = new SizeF(7F, 17F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(398, 485);
+            Controls.Add(buttonCancel);
+            Controls.Add(buttonAdd);
+            Controls.Add(comboBoxSupplier);
+            Controls.Add(comboBoxProduct);
+            Controls.Add(numericUpDown2);
+            Controls.Add(numericUpDown1);
+            Controls.Add(labelPrice);
+            Controls.Add(labelDate);
+            Controls.Add(dateTimePicker1);
+            Controls.Add(labelQuantity);
+            Controls.Add(labelSupplier);
+            Controls.Add(labelProduct);
+            Name = "FormPurchase";
+            Text = "FormPurchases";
+            ((System.ComponentModel.ISupportInitialize)numericUpDown1).EndInit();
+            ((System.ComponentModel.ISupportInitialize)numericUpDown2).EndInit();
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+
+        private Label labelProduct;
+        private Label labelSupplier;
+        private Label labelQuantity;
+        private DateTimePicker dateTimePicker1;
+        private Label labelDate;
+        private Label labelPrice;
+        private NumericUpDown numericUpDown1;
+        private NumericUpDown numericUpDown2;
+        private ComboBox comboBoxProduct;
+        private ComboBox comboBoxSupplier;
+        private Button buttonAdd;
+        private Button buttonCancel;
+    }
+}

ProjectGasStation/ProjectGasStation/Forms/FormPurchase.cs

@@ -0,0 +1,92 @@
+using ProjectGasStation.Entities;
+using ProjectGasStation.Implementations;
+using ProjectGasStation.Repositories;
+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;
+
+namespace ProjectGasStation.Forms
+{
+    public partial class FormPurchase : Form
+    {
+        private readonly IPurchaseRepository _purchaseRepository;
+        private int? _purchaseId;
+
+        public int Id
+        {
+            set
+            {
+                try
+                {
+                    var purchase =
+                    _purchaseRepository.ReadPurchaseById(value);
+                    if (purchase == null)
+                    {
+                        throw new
+                        InvalidDataException(nameof(purchase));
+                    }
+                    comboBoxProduct.SelectedIndex = purchase.ProductId;
+                    comboBoxSupplier.SelectedIndex = purchase.SupplierId;
+                    _purchaseId = value;
+                }
+                catch (Exception ex)
+                {
+                    MessageBox.Show(ex.Message, "Ошибка при получении данных", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                    return;
+                }
+            }
+        }
+        public FormPurchase(IPurchaseRepository purchaseRepository, IProductRepository productRepository, ISupplierRepository supplierRepository)
+        {
+            InitializeComponent();
+            
+            _purchaseRepository = purchaseRepository ?? throw new ArgumentNullException(nameof(purchaseRepository));
+
+            comboBoxProduct.DataSource = productRepository.ReadProducts();
+            comboBoxProduct.DisplayMember = "Name";
+            comboBoxProduct.ValueMember = "Id";
+
+            comboBoxSupplier.DataSource = supplierRepository.ReadSuppliers();
+            comboBoxSupplier.DisplayMember = "Name";
+            comboBoxSupplier.ValueMember = "Id";
+        }
+
+        private void buttonAdd_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                if (comboBoxProduct.SelectedIndex < 0 || comboBoxSupplier.SelectedIndex < 0 || dateTimePicker1.CustomFormat != " ")
+                {
+                    throw new Exception("Имеются незаполненные поля");
+                }
+                if (_purchaseId.HasValue)
+                {
+                    _purchaseRepository.UpdatePurchase(CreatePurchase(_purchaseId.Value));
+                }
+                else
+                {
+                    _purchaseRepository.CreatePurchase(CreatePurchase(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 Purchase CreatePurchase(int id) => Purchase.CreateOperation(id, comboBoxProduct.SelectedIndex, comboBoxSupplier.SelectedIndex, (double)numericUpDown2.Value, Convert.ToDateTime(dateTimePicker1), (double)numericUpDown1.Value);
+        private void dateTimePicker1_ValueChanged(object sender, EventArgs e)
+        {
+
+        }
+    }
+}

ProjectGasStation/ProjectGasStation/Forms/FormPurchase.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>

ProjectGasStation/ProjectGasStation/Forms/FormPurchases.Designer.cs

@@ -0,0 +1,107 @@
+namespace ProjectGasStation.Forms
+{
+    partial class FormPurchases
+    {
+        /// <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()
+        {
+            dataGridView1 = new DataGridView();
+            panel1 = new Panel();
+            buttonUpdate = new Button();
+            buttonAdd = new Button();
+            ((System.ComponentModel.ISupportInitialize)dataGridView1).BeginInit();
+            panel1.SuspendLayout();
+            SuspendLayout();
+            // 
+            // dataGridView1
+            // 
+            dataGridView1.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            dataGridView1.Dock = DockStyle.Fill;
+            dataGridView1.Location = new Point(0, 0);
+            dataGridView1.Name = "dataGridView1";
+            dataGridView1.RowHeadersWidth = 45;
+            dataGridView1.Size = new Size(800, 450);
+            dataGridView1.TabIndex = 0;
+            // 
+            // panel1
+            // 
+            panel1.Controls.Add(buttonUpdate);
+            panel1.Controls.Add(buttonAdd);
+            panel1.Dock = DockStyle.Right;
+            panel1.Location = new Point(647, 0);
+            panel1.Name = "panel1";
+            panel1.Size = new Size(153, 450);
+            panel1.TabIndex = 1;
+            // 
+            // buttonUpdate
+            // 
+            buttonUpdate.BackgroundImage = Properties.Resources.edit;
+            buttonUpdate.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonUpdate.Location = new Point(32, 269);
+            buttonUpdate.Name = "buttonUpdate";
+            buttonUpdate.Size = new Size(83, 75);
+            buttonUpdate.TabIndex = 1;
+            buttonUpdate.UseVisualStyleBackColor = true;
+            // 
+            // buttonAdd
+            // 
+            buttonAdd.BackgroundImage = Properties.Resources.plus1;
+            buttonAdd.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonAdd.Location = new Point(32, 84);
+            buttonAdd.Name = "buttonAdd";
+            buttonAdd.Size = new Size(83, 75);
+            buttonAdd.TabIndex = 0;
+            buttonAdd.UseVisualStyleBackColor = true;
+            buttonAdd.Click += this.buttonAdd_Click;
+            // 
+            // FormPurchases
+            // 
+            AutoScaleDimensions = new SizeF(7F, 17F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(800, 450);
+            Controls.Add(panel1);
+            Controls.Add(dataGridView1);
+            Name = "FormPurchases";
+            Text = "FormPurchase";
+            ((System.ComponentModel.ISupportInitialize)dataGridView1).EndInit();
+            panel1.ResumeLayout(false);
+            ResumeLayout(false);
+            Load += FormPurchases_Load;
+        }
+
+        private void F(object sender, EventArgs e)
+        {
+            throw new NotImplementedException();
+        }
+
+        #endregion
+
+        private DataGridView dataGridView1;
+        private Panel panel1;
+        private Button buttonUpdate;
+        private Button buttonAdd;
+    }
+}

ProjectGasStation/ProjectGasStation/Forms/FormPurchases.cs

@@ -0,0 +1,84 @@
+using ProjectGasStation.Repositories;
+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 Unity;
+
+namespace ProjectGasStation.Forms;
+
+public partial class FormPurchases : Form
+{
+    private readonly IUnityContainer _container;
+    private readonly IPurchaseRepository _purchaseRepository;
+    public FormPurchases(IUnityContainer container, IPurchaseRepository purchaseRepository)
+    {
+        InitializeComponent();
+        _container = container ?? throw new ArgumentNullException(nameof(container));
+        _purchaseRepository = purchaseRepository ?? throw new ArgumentNullException(nameof(_purchaseRepository));
+    }
+
+    private void FormPurchases_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<FormPurchase>().ShowDialog();
+            LoadList();
+        }
+        catch (Exception ex)
+        {
+            MessageBox.Show(ex.Message, "Ошибка при добавлении", MessageBoxButtons.OK, MessageBoxIcon.Error);
+        }
+    }
+
+    private void buttonUpdate_Click(object sender, EventArgs e)
+    {
+        if (!TryGetIdentifierFromSelectedRow(out var findId))
+        {
+            return;
+        }
+        try
+        {
+            var form = _container.Resolve<FormPurchase>();
+            form.Id = findId;
+            form.ShowDialog();
+            LoadList();
+        }
+        catch (Exception ex)
+        {
+            MessageBox.Show(ex.Message, "Ошибка при изменении",
+            MessageBoxButtons.OK, MessageBoxIcon.Error);
+        }
+    }
+
+    private void LoadList() => dataGridView1.DataSource = _purchaseRepository.ReadPurchases();
+    private bool TryGetIdentifierFromSelectedRow(out int id)
+    {
+        id = 0;
+        if (dataGridView1.SelectedRows.Count < 1)
+        {
+            MessageBox.Show("Нет выбранной записи", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            return false;
+        }
+        id = Convert.ToInt32(dataGridView1.SelectedRows[0].Cells["Id"].Value);
+        return true;
+    }
+}
+

ProjectGasStation/ProjectGasStation/Forms/FormPurchases.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>

ProjectGasStation/ProjectGasStation/Forms/FormSale.Designer.cs

@@ -0,0 +1,153 @@
+namespace ProjectGasStation.Forms
+{
+    partial class FormSale
+    {
+        /// <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()
+        {
+            labelEmployee = new Label();
+            dateTimePicker1 = new DateTimePicker();
+            label1 = new Label();
+            dataGridView1 = new DataGridView();
+            ColumnProduct = new DataGridViewComboBoxColumn();
+            ColumnQuantity = new DataGridViewTextBoxColumn();
+            buttonAdd = new Button();
+            buttonCancel = new Button();
+            comboBoxEmployee = new ComboBox();
+            ((System.ComponentModel.ISupportInitialize)dataGridView1).BeginInit();
+            SuspendLayout();
+            // 
+            // labelEmployee
+            // 
+            labelEmployee.AutoSize = true;
+            labelEmployee.Location = new Point(12, 29);
+            labelEmployee.Name = "labelEmployee";
+            labelEmployee.Size = new Size(70, 17);
+            labelEmployee.TabIndex = 0;
+            labelEmployee.Text = "Сотрудник";
+            // 
+            // dateTimePicker1
+            // 
+            dateTimePicker1.Location = new Point(58, 73);
+            dateTimePicker1.Name = "dateTimePicker1";
+            dateTimePicker1.Size = new Size(221, 25);
+            dateTimePicker1.TabIndex = 1;
+            // 
+            // label1
+            // 
+            label1.AutoSize = true;
+            label1.Location = new Point(12, 73);
+            label1.Name = "label1";
+            label1.Size = new Size(36, 17);
+            label1.TabIndex = 2;
+            label1.Text = "Дата";
+            // 
+            // dataGridView1
+            // 
+            dataGridView1.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            dataGridView1.Columns.AddRange(new DataGridViewColumn[] { ColumnProduct, ColumnQuantity });
+            dataGridView1.Location = new Point(12, 197);
+            dataGridView1.Name = "dataGridView1";
+            dataGridView1.RowHeadersWidth = 45;
+            dataGridView1.Size = new Size(267, 329);
+            dataGridView1.TabIndex = 3;
+            // 
+            // ColumnProduct
+            // 
+            ColumnProduct.HeaderText = "Товар";
+            ColumnProduct.MinimumWidth = 6;
+            ColumnProduct.Name = "ColumnProduct";
+            ColumnProduct.Resizable = DataGridViewTriState.True;
+            ColumnProduct.SortMode = DataGridViewColumnSortMode.Automatic;
+            ColumnProduct.Width = 110;
+            // 
+            // ColumnQuantity
+            // 
+            ColumnQuantity.HeaderText = "Количество";
+            ColumnQuantity.MinimumWidth = 6;
+            ColumnQuantity.Name = "ColumnQuantity";
+            ColumnQuantity.Width = 110;
+            // 
+            // buttonAdd
+            // 
+            buttonAdd.Location = new Point(12, 555);
+            buttonAdd.Name = "buttonAdd";
+            buttonAdd.Size = new Size(115, 43);
+            buttonAdd.TabIndex = 4;
+            buttonAdd.Text = "Добавить";
+            buttonAdd.UseVisualStyleBackColor = true;
+            buttonAdd.Click += buttonAdd_Click;
+            // 
+            // buttonCancel
+            // 
+            buttonCancel.Location = new Point(164, 555);
+            buttonCancel.Name = "buttonCancel";
+            buttonCancel.Size = new Size(115, 43);
+            buttonCancel.TabIndex = 5;
+            buttonCancel.Text = "Отмена";
+            buttonCancel.UseVisualStyleBackColor = true;
+            buttonCancel.Click += buttonCancel_Click;
+            // 
+            // comboBoxEmployee
+            // 
+            comboBoxEmployee.FormattingEnabled = true;
+            comboBoxEmployee.Location = new Point(88, 29);
+            comboBoxEmployee.Name = "comboBoxEmployee";
+            comboBoxEmployee.Size = new Size(193, 25);
+            comboBoxEmployee.TabIndex = 6;
+            // 
+            // FormSale
+            // 
+            AutoScaleDimensions = new SizeF(7F, 17F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(293, 622);
+            Controls.Add(comboBoxEmployee);
+            Controls.Add(buttonCancel);
+            Controls.Add(buttonAdd);
+            Controls.Add(dataGridView1);
+            Controls.Add(label1);
+            Controls.Add(dateTimePicker1);
+            Controls.Add(labelEmployee);
+            Name = "FormSale";
+            Text = "FormSale";
+            ((System.ComponentModel.ISupportInitialize)dataGridView1).EndInit();
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+
+        private Label labelEmployee;
+        private DateTimePicker dateTimePicker1;
+        private Label label1;
+        private DataGridView dataGridView1;
+        private Button buttonAdd;
+        private Button buttonCancel;
+        private ComboBox comboBoxEmployee;
+        private DataGridViewComboBoxColumn ColumnProduct;
+        private DataGridViewTextBoxColumn ColumnQuantity;
+    }
+}

ProjectGasStation/ProjectGasStation/Forms/FormSale.cs

@@ -0,0 +1,65 @@
+using ProjectGasStation.Entities;
+using ProjectGasStation.Implementations;
+using ProjectGasStation.Repositories;
+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;
+
+namespace ProjectGasStation.Forms;
+
+public partial class FormSale : Form
+{
+    private readonly ISaleRepository _saleRepository;
+    public FormSale(ISaleRepository saleRepository, IProductRepository productRepository, IEmployeeRepository employeeRepository)
+    {
+        InitializeComponent();
+        _saleRepository = saleRepository ?? throw new ArgumentNullException(nameof(saleRepository));
+
+        //comboBoxEmployee.DataSource = employeeRepository.ReadEmployees();
+        //comboBoxEmployee.DisplayMember = "Name";
+        //comboBoxEmployee.ValueMember = "Id";
+
+        //ColumnProduct.DataSource = productRepository.ReadProducts();
+        //ColumnProduct.DisplayMember = "ServiceType";
+        //ColumnProduct.ValueMember = "Id";
+    }
+
+    private void buttonAdd_Click(object sender, EventArgs e)
+    {
+        if (dataGridView1.RowCount < 1 || comboBoxEmployee.SelectedIndex < 0 || dateTimePicker1.CustomFormat != " ")
+        {
+            throw new Exception("Имеются незаполненны поля");
+        }
+        try
+        {
+            _saleRepository.CreateSale(Sale.CreateOperation(0, comboBoxEmployee.SelectedIndex, dateTimePicker1.Value, CreateListServiceFromDataGrid()));
+            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 List<SaleProduct> CreateListServiceFromDataGrid()
+    {
+        var list = new List<SaleProduct>();
+        foreach (DataGridViewRow row in dataGridView1.Rows)
+        {
+            if (row.Cells["ColumService"].Value == null || row.Cells["ColumQuantity"].Value == null || row.Cells["ColumnExecutionDate"].Value == null)
+            {
+                continue;
+            }
+            list.Add(SaleProduct.CreateOperation(0, 0, Convert.ToInt32(row.Cells["ColumnProduct"].Value), Convert.ToDouble(row.Cells["ColumnQuantity"].Value)));
+        }
+        return list;
+    }
+}

ProjectGasStation/ProjectGasStation/Forms/FormSale.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>

ProjectGasStation/ProjectGasStation/Forms/FormSales.Designer.cs

@@ -0,0 +1,89 @@
+namespace ProjectGasStation.Forms
+{
+    partial class FormSales
+    {
+        /// <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();
+            dataGridView = new DataGridView();
+            panel1.SuspendLayout();
+            ((System.ComponentModel.ISupportInitialize)dataGridView).BeginInit();
+            SuspendLayout();
+            // 
+            // panel1
+            // 
+            panel1.Controls.Add(buttonAdd);
+            panel1.Dock = DockStyle.Right;
+            panel1.Location = new Point(626, 0);
+            panel1.Name = "panel1";
+            panel1.Size = new Size(174, 450);
+            panel1.TabIndex = 0;
+            // 
+            // buttonAdd
+            // 
+            buttonAdd.BackgroundImage = Properties.Resources.plus1;
+            buttonAdd.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonAdd.Location = new Point(42, 50);
+            buttonAdd.Name = "buttonAdd";
+            buttonAdd.Size = new Size(96, 94);
+            buttonAdd.TabIndex = 0;
+            buttonAdd.UseVisualStyleBackColor = true;
+            buttonAdd.Click += buttonAdd_Click;
+            // 
+            // dataGridView
+            // 
+            dataGridView.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            dataGridView.Dock = DockStyle.Fill;
+            dataGridView.Location = new Point(0, 0);
+            dataGridView.Name = "dataGridView";
+            dataGridView.RowHeadersWidth = 45;
+            dataGridView.Size = new Size(626, 450);
+            dataGridView.TabIndex = 1;
+            // 
+            // FormSales
+            // 
+            AutoScaleDimensions = new SizeF(7F, 17F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(800, 450);
+            Controls.Add(dataGridView);
+            Controls.Add(panel1);
+            Name = "FormSales";
+            Text = "Sales";
+            panel1.ResumeLayout(false);
+            ((System.ComponentModel.ISupportInitialize)dataGridView).EndInit();
+            ResumeLayout(false);
+            Load += FormSales_Load;
+        }
+
+        #endregion
+
+        private Panel panel1;
+        private DataGridView dataGridView;
+        private Button buttonAdd;
+    }
+}

ProjectGasStation/ProjectGasStation/Forms/FormSales.cs

@@ -0,0 +1,63 @@
+using ProjectGasStation.Repositories;
+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 Unity;
+
+namespace ProjectGasStation.Forms;
+
+public partial class FormSales : Form
+{
+    private readonly IUnityContainer _container;
+    private readonly ISaleRepository _saleRepository;
+    public FormSales(IUnityContainer container, ISaleRepository saleRepository)
+    {
+        InitializeComponent();
+        _container = container ?? throw new ArgumentNullException(nameof(container));
+        _saleRepository = saleRepository ?? throw new ArgumentNullException(nameof(saleRepository));
+    }
+    
+    private void FormSales_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<FormSale>().ShowDialog();
+            LoadList();
+        }
+        catch (Exception ex)
+        {
+            MessageBox.Show(ex.Message, "Ошибка при добавлении", MessageBoxButtons.OK, MessageBoxIcon.Error);
+        }
+    }
+    private void LoadList() => dataGridView.DataSource = _saleRepository.ReadSales();
+
+    private bool TryGetIdentifierFromSelectedRow(out int id)
+    {
+        id = 0;
+        if (dataGridView.SelectedRows.Count < 1)
+        {
+            MessageBox.Show("Нет выбранной записи", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            return false;
+        }
+        id = Convert.ToInt32(dataGridView.SelectedRows[0].Cells["Id"].Value);
+        return true;
+    }
+}

ProjectGasStation/ProjectGasStation/Forms/FormSales.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>

ProjectGasStation/ProjectGasStation/Forms/FormSupplier.Designer.cs

@@ -0,0 +1,128 @@
+namespace ProjectGasStation.Forms
+{
+    partial class FormSupplier
+    {
+        /// <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()
+        {
+            labelName = new Label();
+            label1 = new Label();
+            labelINN = new Label();
+            textBoxName = new TextBox();
+            textBoxINN = new TextBox();
+            buttonAdd = new Button();
+            button2 = new Button();
+            SuspendLayout();
+            // 
+            // labelName
+            // 
+            labelName.AutoSize = true;
+            labelName.Location = new Point(43, 63);
+            labelName.Name = "labelName";
+            labelName.Size = new Size(65, 17);
+            labelName.TabIndex = 0;
+            labelName.Text = "Название";
+            // 
+            // label1
+            // 
+            label1.AutoSize = true;
+            label1.Location = new Point(43, 125);
+            label1.Name = "label1";
+            label1.Size = new Size(0, 17);
+            label1.TabIndex = 1;
+            // 
+            // labelINN
+            // 
+            labelINN.AutoSize = true;
+            labelINN.Location = new Point(49, 119);
+            labelINN.Name = "labelINN";
+            labelINN.Size = new Size(36, 17);
+            labelINN.TabIndex = 2;
+            labelINN.Text = "ИНН";
+            // 
+            // textBoxName
+            // 
+            textBoxName.Location = new Point(144, 65);
+            textBoxName.Name = "textBoxName";
+            textBoxName.Size = new Size(110, 25);
+            textBoxName.TabIndex = 3;
+            // 
+            // textBoxINN
+            // 
+            textBoxINN.Location = new Point(145, 116);
+            textBoxINN.Name = "textBoxINN";
+            textBoxINN.Size = new Size(110, 25);
+            textBoxINN.TabIndex = 4;
+            // 
+            // buttonAdd
+            // 
+            buttonAdd.Location = new Point(25, 243);
+            buttonAdd.Name = "buttonAdd";
+            buttonAdd.Size = new Size(97, 32);
+            buttonAdd.TabIndex = 5;
+            buttonAdd.Text = "Добавить";
+            buttonAdd.UseVisualStyleBackColor = true;
+            buttonAdd.Click += buttonAdd_Click;
+            // 
+            // button2
+            // 
+            button2.Location = new Point(170, 243);
+            button2.Name = "button2";
+            button2.Size = new Size(97, 32);
+            button2.TabIndex = 6;
+            button2.Text = "Отмена";
+            button2.UseVisualStyleBackColor = true;
+            button2.Click += button2_Click;
+            // 
+            // FormSupplier
+            // 
+            AutoScaleDimensions = new SizeF(7F, 17F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(299, 307);
+            Controls.Add(button2);
+            Controls.Add(buttonAdd);
+            Controls.Add(textBoxINN);
+            Controls.Add(textBoxName);
+            Controls.Add(labelINN);
+            Controls.Add(label1);
+            Controls.Add(labelName);
+            Name = "FormSupplier";
+            Text = "FormSupplier";
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+
+        private Label labelName;
+        private Label label1;
+        private Label labelINN;
+        private TextBox textBoxName;
+        private TextBox textBoxINN;
+        private Button buttonAdd;
+        private Button button2;
+    }
+}

ProjectGasStation/ProjectGasStation/Forms/FormSupplier.cs

@@ -0,0 +1,77 @@
+using ProjectGasStation.Entities;
+using ProjectGasStation.Repositories;
+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;
+
+namespace ProjectGasStation.Forms
+{
+    public partial class FormSupplier : Form
+    {
+        private readonly ISupplierRepository _supplierRepository;
+        private int? _supplierId;
+
+        public int Id
+        {
+            set
+            {
+                try
+                {
+                    var supplier = _supplierRepository.ReadSupplierById(value);
+                    if (supplier == null)
+                    {
+                        throw new InvalidDataException(nameof(supplier));
+                    }
+                    textBoxName.Text = supplier.Name;
+                    textBoxINN.Text = supplier.INN;
+                    _supplierId = value;
+                }
+                catch (Exception ex)
+                {
+                    MessageBox.Show(ex.Message, "Ошибка при получении данных", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                    return;
+                }
+            }
+        }
+
+        public FormSupplier(ISupplierRepository supplierRepository)
+        {
+            InitializeComponent();
+            _supplierRepository = supplierRepository ?? throw new ArgumentNullException(nameof(supplierRepository));
+        }
+
+        private void buttonAdd_Click(object sender, EventArgs e)
+        {
+            try
+            {
+                if (string.IsNullOrWhiteSpace(textBoxName.Text) || string.IsNullOrWhiteSpace(textBoxINN.Text))
+                {
+                    throw new Exception("Имеются незаполненные поля");
+                }
+                if (_supplierId.HasValue)
+                {
+                    _supplierRepository.UpdateSupplier(CreateSupplier(_supplierId.Value));
+                }
+                else
+                {
+                    _supplierRepository.CreateSupplier(CreateSupplier(0));
+                }
+                Close();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при сохранении", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void button2_Click(object sender, EventArgs e) => Close();
+  
+        private Supplier CreateSupplier(int id) => Supplier.CreateEntity(id, textBoxName.Text, textBoxINN.Text);
+    }
+}

ProjectGasStation/ProjectGasStation/Forms/FormSupplier.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>

ProjectGasStation/ProjectGasStation/Forms/FormSuppliers.Designer.cs

@@ -0,0 +1,117 @@
+namespace ProjectGasStation.Forms
+{
+    partial class FormSuppliers
+    {
+        /// <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();
+            buttonUpdate = new Button();
+            buttonRemove = new Button();
+            buttonAdd = new Button();
+            dataGridView = new DataGridView();
+            panel1.SuspendLayout();
+            ((System.ComponentModel.ISupportInitialize)dataGridView).BeginInit();
+            SuspendLayout();
+            // 
+            // panel1
+            // 
+            panel1.Controls.Add(buttonUpdate);
+            panel1.Controls.Add(buttonRemove);
+            panel1.Controls.Add(buttonAdd);
+            panel1.Dock = DockStyle.Right;
+            panel1.Location = new Point(660, 0);
+            panel1.Name = "panel1";
+            panel1.Size = new Size(140, 450);
+            panel1.TabIndex = 0;
+            // 
+            // buttonUpdate
+            // 
+            buttonUpdate.BackgroundImage = Properties.Resources.edit;
+            buttonUpdate.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonUpdate.Location = new Point(30, 282);
+            buttonUpdate.Name = "buttonUpdate";
+            buttonUpdate.Size = new Size(83, 73);
+            buttonUpdate.TabIndex = 2;
+            buttonUpdate.UseVisualStyleBackColor = true;
+            buttonUpdate.Click += buttonUpdate_Click;
+            // 
+            // buttonRemove
+            // 
+            buttonRemove.BackgroundImage = Properties.Resources.minus;
+            buttonRemove.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonRemove.Location = new Point(30, 167);
+            buttonRemove.Name = "buttonRemove";
+            buttonRemove.Size = new Size(83, 73);
+            buttonRemove.TabIndex = 1;
+            buttonRemove.UseVisualStyleBackColor = true;
+            buttonRemove.Click += buttonRemove_Click;
+            // 
+            // buttonAdd
+            // 
+            buttonAdd.BackgroundImage = Properties.Resources.plus1;
+            buttonAdd.BackgroundImageLayout = ImageLayout.Stretch;
+            buttonAdd.Location = new Point(30, 46);
+            buttonAdd.Name = "buttonAdd";
+            buttonAdd.Size = new Size(83, 73);
+            buttonAdd.TabIndex = 0;
+            buttonAdd.UseVisualStyleBackColor = true;
+            buttonAdd.Click += buttonAdd_Click;
+            // 
+            // dataGridView
+            // 
+            dataGridView.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            dataGridView.Dock = DockStyle.Fill;
+            dataGridView.Location = new Point(0, 0);
+            dataGridView.Name = "dataGridView";
+            dataGridView.RowHeadersWidth = 45;
+            dataGridView.Size = new Size(660, 450);
+            dataGridView.TabIndex = 1;
+            // 
+            // FormSuppliers
+            // 
+            AutoScaleDimensions = new SizeF(7F, 17F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(800, 450);
+            Controls.Add(dataGridView);
+            Controls.Add(panel1);
+            Name = "FormSuppliers";
+            Text = "FormSuppliers";
+            panel1.ResumeLayout(false);
+            ((System.ComponentModel.ISupportInitialize)dataGridView).EndInit();
+            ResumeLayout(false);
+            Load += FormSuppliers_Load;
+        }
+
+        #endregion
+
+        private Panel panel1;
+        private Button buttonUpdate;
+        private Button buttonRemove;
+        private Button buttonAdd;
+        private DataGridView dataGridView;
+    }
+}

ProjectGasStation/ProjectGasStation/Forms/FormSuppliers.cs

@@ -0,0 +1,107 @@
+using ProjectGasStation.Repositories;
+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 Unity;
+
+namespace ProjectGasStation.Forms
+{
+    public partial class FormSuppliers : Form
+    {
+        private readonly IUnityContainer _container;
+        private readonly ISupplierRepository _supplierRepository;
+
+        public FormSuppliers(IUnityContainer container, ISupplierRepository supplierRepository)
+        {
+            InitializeComponent();
+            _container = container ?? throw new ArgumentNullException(nameof(container));
+            _supplierRepository = supplierRepository ?? throw new ArgumentNullException(nameof(supplierRepository));
+        }
+
+        private void FormSuppliers_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<FormSupplier>().ShowDialog();
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при добавлении", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void buttonRemove_Click(object sender, EventArgs e)
+        {
+            if (!TryGetIdentifierFromSelectedRow(out var findId))
+            {
+                return;
+            }
+            if (MessageBox.Show("Удалить запись?", "Удаление", MessageBoxButtons.YesNo) != DialogResult.Yes)
+            {
+                return;
+            }
+            try
+            {
+                _supplierRepository.DeleteSupplier(findId);
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при удалении", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void buttonUpdate_Click(object sender, EventArgs e)
+        {
+            if (!TryGetIdentifierFromSelectedRow(out var findId))
+            {
+                return;
+            }
+            try
+            {
+                var form = _container.Resolve<FormSupplier>();
+                form.Id = findId;
+                form.ShowDialog();
+                LoadList();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Ошибка при изменении", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private void LoadList() => dataGridView.DataSource = _supplierRepository.ReadSuppliers();
+
+        private bool TryGetIdentifierFromSelectedRow(out int id)
+        {
+            id = 0;
+            if (dataGridView.SelectedRows.Count < 1)
+            {
+                MessageBox.Show("Нет выбранной записи", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return false;
+            }
+            id = Convert.ToInt32(dataGridView.SelectedRows[0].Cells["Id"].Value);
+            return true;
+        }
+    }
+}

ProjectGasStation/ProjectGasStation/Forms/FormSuppliers.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>

ProjectGasStation/ProjectGasStation/Implementations/EmployeeRepository.cs

@@ -0,0 +1,38 @@
+using ProjectGasStation.Entities;
+using ProjectGasStation.Entities.Enums;
+using ProjectGasStation.Repositories;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectGasStation.Implementations;
+
+public class EmployeeRepository : IEmployeeRepository
+{
+    public void CreateEmployee(Employee employee)
+    {
+
+    }
+
+    public void DeleteEmployee(int id)
+    {
+
+    }
+
+    public Employee ReadEmployeeById(int id)
+    {
+        return Employee.CreateEntity(0, string.Empty, EmployeePost.None);
+    }
+
+    public IEnumerable<Employee> ReadEmployees() 
+    {
+        return [];
+    }
+
+    public void UpdateEmployee(Employee employee) 
+    {
+
+    }
+}

ProjectGasStation/ProjectGasStation/Implementations/ProductRepository.cs

@@ -0,0 +1,38 @@
+using ProjectGasStation.Entities;
+using ProjectGasStation.Entities.Enums;
+using ProjectGasStation.Repositories;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectGasStation.Implementations;
+
+public class ProductRepository : IProductRepository
+{
+    public void CreateProduct(Product product)
+    {
+
+    }
+
+    public void DeleteProduct(int id) 
+    {
+
+    }
+
+    public Product ReadProductById(int id)
+    {
+        return Product.CreateEntity(0, string.Empty, 0, ProductType.None);
+    }
+
+    public IEnumerable<Product> ReadProducts()
+    {
+        return [];
+    }
+
+    public void UpdateProduct(Product product) 
+    {
+
+    }
+}

ProjectGasStation/ProjectGasStation/Implementations/PurchaseRepository.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using ProjectGasStation.Entities;
+using ProjectGasStation.Repositories;
+
+namespace ProjectGasStation.Implementations;
+
+public class PurchaseRepository : IPurchaseRepository
+{
+    public void CreatePurchase(Purchase purchase)
+    {
+
+    }
+
+    public IEnumerable<Purchase> ReadPurchases(DateTime? dateFrom = null, DateTime? dateTo = null, int? supplierId = null, int? productId = null)
+    {
+        return [];
+    }
+
+    public void UpdatePurchase(Purchase purchase)
+    {
+
+    }
+
+    public Purchase ReadPurchaseById(int id)
+    {
+        return null;
+    }
+
+}

ProjectGasStation/ProjectGasStation/Implementations/SaleRepository.cs

@@ -0,0 +1,22 @@
+using ProjectGasStation.Entities;
+using ProjectGasStation.Repositories;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectGasStation.Implementations;
+
+public class SaleRepository : ISaleRepository
+{
+    public void CreateSale(Sale sale)
+    {
+
+    }
+
+    public IEnumerable<Sale> ReadSales(DateTime? dateFrom = null, DateTime? dateTo = null, int? employeeId = null)
+    {
+        return [];
+    }
+}

ProjectGasStation/ProjectGasStation/Implementations/SupplierRepository.cs

@@ -0,0 +1,37 @@
+using ProjectGasStation.Entities;
+using ProjectGasStation.Repositories;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectGasStation.Implementations;
+
+public class SupplierRepository : ISupplierRepository
+{
+    public void CreateSupplier(Supplier supplier)
+    {
+
+    }
+
+    public void DeleteSupplier(int id)
+    {
+
+    }
+
+    public Supplier ReadSupplierById(int id)
+    {
+        return Supplier.CreateEntity(0, string.Empty, string.Empty);
+    }
+
+    public IEnumerable<Supplier> ReadSuppliers()
+    {
+        return [];
+    }
+
+    public void UpdateSupplier(Supplier supplier) 
+    {
+
+    }
+}

ProjectGasStation/ProjectGasStation/Program.cs

@@ -1,3 +1,7 @@
+using ProjectGasStation.Implementations;
+using ProjectGasStation.Repositories;
+using Unity;
+
 namespace ProjectGasStation
 {
     internal static class Program
@@ -11,7 +15,20 @@ namespace ProjectGasStation
             // 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(CreateUnityContainer().Resolve<FormGasStation>());
+        }
+
+        private static IUnityContainer CreateUnityContainer()
+        {
+            var container = new UnityContainer();
+
+            container.RegisterType<IEmployeeRepository, EmployeeRepository>();
+            container.RegisterType<IProductRepository, ProductRepository>();
+            container.RegisterType<IPurchaseRepository, PurchaseRepository>();
+            container.RegisterType<ISaleRepository, SaleRepository>();
+            container.RegisterType<ISupplierRepository, SupplierRepository>();
+
+            return container;
         }
     }
 }

ProjectGasStation/ProjectGasStation/ProjectGasStation.csproj

@@ -2,10 +2,29 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net6.0-windows</TargetFramework>
+    <TargetFramework>net8.0-windows7.0</TargetFramework>
     <Nullable>enable</Nullable>
     <UseWindowsForms>true</UseWindowsForms>
     <ImplicitUsings>enable</ImplicitUsings>
   </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>

ProjectGasStation/ProjectGasStation/Properties/Resources.Designer.cs

@@ -0,0 +1,113 @@
+//------------------------------------------------------------------------------
+// <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 ProjectGasStation.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("ProjectGasStation.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 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 minus {
+            get {
+                object obj = ResourceManager.GetObject("minus", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Поиск локализованного ресурса типа System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap plus {
+            get {
+                object obj = ResourceManager.GetObject("plus", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Поиск локализованного ресурса типа System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap plus1 {
+            get {
+                object obj = ResourceManager.GetObject("plus1", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
+        /// <summary>
+        ///   Поиск локализованного ресурса типа System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap Union_76_Gas_Station {
+            get {
+                object obj = ResourceManager.GetObject("Union_76_Gas_Station", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+    }
+}

ProjectGasStation/ProjectGasStation/Properties/Resources.resx

@@ -0,0 +1,136 @@
+<?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="minus" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\minus.jpg;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="plus1" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\plus.jpg;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="plus" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\plus.jpg;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
+  <data name="Union_76_Gas_Station" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\Union_76_Gas_Station.jpg;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>

ProjectGasStation/ProjectGasStation/Repositories/IEmployeeRepository.cs

@@ -0,0 +1,21 @@
+using ProjectGasStation.Entities;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectGasStation.Repositories;
+
+public interface IEmployeeRepository
+{
+    IEnumerable<Employee> ReadEmployees();
+
+    Employee ReadEmployeeById(int id);
+
+    void CreateEmployee(Employee employee);
+
+    void UpdateEmployee(Employee employee);
+
+    void DeleteEmployee(int id);
+}

ProjectGasStation/ProjectGasStation/Repositories/IProductRepository.cs

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

ProjectGasStation/ProjectGasStation/Repositories/IPurchaseRepository.cs

@@ -0,0 +1,18 @@
+using ProjectGasStation.Entities;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectGasStation.Repositories;
+
+public interface IPurchaseRepository
+{
+    IEnumerable<Purchase> ReadPurchases(DateTime? dateFrom = null, DateTime? dateTo = null, int? supplierId = null, int? productId = null);
+
+    Purchase ReadPurchaseById(int id);
+    void CreatePurchase(Purchase purchase);
+
+    void UpdatePurchase(Purchase purchase);
+}

ProjectGasStation/ProjectGasStation/Repositories/ISaleRepository.cs

@@ -0,0 +1,17 @@
+using ProjectGasStation.Entities;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectGasStation.Repositories;
+
+public interface ISaleRepository
+{
+    IEnumerable<Sale> ReadSales(DateTime? dateFrom = null, DateTime? dateTo = null, int? employeeId = null);
+
+    
+    void CreateSale(Sale sale); 
+
+}

ProjectGasStation/ProjectGasStation/Repositories/ISupplierRepository.cs

@@ -0,0 +1,21 @@
+using ProjectGasStation.Entities;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ProjectGasStation.Repositories;
+
+public interface ISupplierRepository
+{
+    IEnumerable<Supplier> ReadSuppliers();
+
+    Supplier ReadSupplierById(int id);
+
+    void CreateSupplier(Supplier supplier);
+
+    void UpdateSupplier(Supplier supplier);
+
+    void DeleteSupplier(int id);
+}