diff --git a/CustomComboBox/BusinessLogic/WorkerLogic.cs b/CustomComboBox/BusinessLogic/WorkerLogic.cs
index 782663a..72b12ab 100644
--- a/CustomComboBox/BusinessLogic/WorkerLogic.cs
+++ b/CustomComboBox/BusinessLogic/WorkerLogic.cs
@@ -63,7 +63,7 @@ namespace BusinessLogic
         }
         public bool Delete(WorkerBindingModel model)
         {
-            CheckModel(model);
+            CheckModel(model, false);
             if (_workerStorage.Delete(model) == null)
             {
                 return false;
diff --git a/CustomComboBox/TestApp/FormMain.Designer.cs b/CustomComboBox/TestApp/FormMain.Designer.cs
index 2170db3..c47289f 100644
--- a/CustomComboBox/TestApp/FormMain.Designer.cs
+++ b/CustomComboBox/TestApp/FormMain.Designer.cs
@@ -37,6 +37,7 @@
             pdfToolStripMenuItem = new ToolStripMenuItem();
             excelToolStripMenuItem = new ToolStripMenuItem();
             wordToolStripMenuItem = new ToolStripMenuItem();
+            customTreeView = new BelianinComponents.CustomTreeView();
             menuStrip1.SuspendLayout();
             SuspendLayout();
             // 
@@ -46,7 +47,7 @@
             menuStrip1.Items.AddRange(new ToolStripItem[] { menuToolStripMenuItem });
             menuStrip1.Location = new Point(0, 0);
             menuStrip1.Name = "menuStrip1";
-            menuStrip1.Size = new Size(800, 28);
+            menuStrip1.Size = new Size(550, 28);
             menuStrip1.TabIndex = 1;
             menuStrip1.Text = "menuStrip1";
             // 
@@ -69,18 +70,21 @@
             addWorkerToolStripMenuItem.Name = "addWorkerToolStripMenuItem";
             addWorkerToolStripMenuItem.Size = new Size(224, 26);
             addWorkerToolStripMenuItem.Text = "add worker";
+            addWorkerToolStripMenuItem.Click += addWorkerToolStripMenuItem_Click;
             // 
             // editWorkerToolStripMenuItem
             // 
             editWorkerToolStripMenuItem.Name = "editWorkerToolStripMenuItem";
             editWorkerToolStripMenuItem.Size = new Size(224, 26);
             editWorkerToolStripMenuItem.Text = "edit worker";
+            editWorkerToolStripMenuItem.Click += editWorkerToolStripMenuItem_Click;
             // 
             // deleteWorkerToolStripMenuItem
             // 
             deleteWorkerToolStripMenuItem.Name = "deleteWorkerToolStripMenuItem";
             deleteWorkerToolStripMenuItem.Size = new Size(224, 26);
             deleteWorkerToolStripMenuItem.Text = "delete worker";
+            deleteWorkerToolStripMenuItem.Click += deleteWorkerToolStripMenuItem_Click;
             // 
             // pdfToolStripMenuItem
             // 
@@ -100,11 +104,20 @@
             wordToolStripMenuItem.Size = new Size(224, 26);
             wordToolStripMenuItem.Text = "word";
             // 
+            // customTreeView
+            // 
+            customTreeView.hierarchy = null;
+            customTreeView.Location = new Point(12, 31);
+            customTreeView.Name = "customTreeView";
+            customTreeView.Size = new Size(529, 271);
+            customTreeView.TabIndex = 2;
+            // 
             // FormMain
             // 
             AutoScaleDimensions = new SizeF(8F, 20F);
             AutoScaleMode = AutoScaleMode.Font;
-            ClientSize = new Size(800, 450);
+            ClientSize = new Size(550, 312);
+            Controls.Add(customTreeView);
             Controls.Add(menuStrip1);
             MainMenuStrip = menuStrip1;
             Name = "FormMain";
@@ -125,5 +138,6 @@
         private ToolStripMenuItem pdfToolStripMenuItem;
         private ToolStripMenuItem excelToolStripMenuItem;
         private ToolStripMenuItem wordToolStripMenuItem;
+        private BelianinComponents.CustomTreeView customTreeView;
     }
 }
\ No newline at end of file
diff --git a/CustomComboBox/TestApp/FormMain.cs b/CustomComboBox/TestApp/FormMain.cs
index 502a2b6..35c80f6 100644
--- a/CustomComboBox/TestApp/FormMain.cs
+++ b/CustomComboBox/TestApp/FormMain.cs
@@ -1,4 +1,6 @@
 using Contracts.BusinessLogicContracts;
+using Contracts.BindingModels;
+using Contracts.ViewModels;
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
@@ -20,7 +22,20 @@ namespace TestApp
             InitializeComponent();
             _workerLogic = workerLogic;
             _jobTypeLogic = jobTypeLogic;
-
+            LoadData();
+        }
+        private void LoadData()
+        {
+            var list = _workerLogic.ReadList(null);
+            if (list != null)
+            {
+                customTreeView.Clear();
+                customTreeView.hierarchy = new List<string> { "JobType", "DateAdvance", "Id", "Name" };
+                foreach (var item in list)
+                {
+                    customTreeView.AddNode(item, "Name");
+                }
+            }
         }
 
         private void jobTypesToolStripMenuItem_Click(object sender, EventArgs e)
@@ -31,5 +46,42 @@ namespace TestApp
                 form.ShowDialog();
             }
         }
+
+        private void addWorkerToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            var service = Program.ServiceProvider?.GetService(typeof(FormWorker));
+            if (service is FormWorker form)
+            {
+                form.ShowDialog();
+            }
+            LoadData();
+        }
+
+        private void editWorkerToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            Transmit item = customTreeView.GetSelectedNode<Transmit>();
+
+            int id = Convert.ToInt32(item.Id);
+            FormWorker form = new FormWorker(_jobTypeLogic, _workerLogic, id);
+            form.ShowDialog();
+            LoadData();
+        }
+
+        private void deleteWorkerToolStripMenuItem_Click(object sender, EventArgs e)
+        {
+            var confirmResult = MessageBox.Show("Вы действительно хотите удалить запись?", "Подтвердите действие",
+                MessageBoxButtons.YesNo,
+                MessageBoxIcon.Question
+            );
+            Transmit item = customTreeView.GetSelectedNode<Transmit>();
+            if (confirmResult == DialogResult.Yes)
+            {
+                _workerLogic.Delete(new WorkerBindingModel
+                {
+                    Id = Convert.ToInt32(item.Id)
+                });
+                LoadData();
+            }
+        }
     }
 }
diff --git a/CustomComboBox/TestApp/FormWorker.Designer.cs b/CustomComboBox/TestApp/FormWorker.Designer.cs
new file mode 100644
index 0000000..0dbd02e
--- /dev/null
+++ b/CustomComboBox/TestApp/FormWorker.Designer.cs
@@ -0,0 +1,174 @@
+namespace TestApp
+{
+    partial class FormWorker
+    {
+        /// <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()
+        {
+            label1 = new Label();
+            label2 = new Label();
+            label3 = new Label();
+            label4 = new Label();
+            textBoxName = new TextBox();
+            textBoxAutobiography = new TextBox();
+            customComboBox = new BarsukovComponents.VisualComponents.CustomComboBox();
+            dateBoxWithNull = new KryukovLib.DateBoxWithNull();
+            buttonCancel = new Button();
+            buttonOK = new Button();
+            SuspendLayout();
+            // 
+            // label1
+            // 
+            label1.AutoSize = true;
+            label1.Font = new Font("Times New Roman", 12F);
+            label1.Location = new Point(101, 10);
+            label1.Name = "label1";
+            label1.Size = new Size(60, 22);
+            label1.TabIndex = 0;
+            label1.Text = "ФИО:";
+            // 
+            // label2
+            // 
+            label2.AutoSize = true;
+            label2.Font = new Font("Times New Roman", 12F);
+            label2.Location = new Point(12, 45);
+            label2.Name = "label2";
+            label2.Size = new Size(149, 22);
+            label2.TabIndex = 1;
+            label2.Text = "Автобиография:";
+            // 
+            // label3
+            // 
+            label3.AutoSize = true;
+            label3.Font = new Font("Times New Roman", 12F);
+            label3.Location = new Point(49, 80);
+            label3.Name = "label3";
+            label3.Size = new Size(112, 22);
+            label3.TabIndex = 2;
+            label3.Text = "Должность:";
+            // 
+            // label4
+            // 
+            label4.Font = new Font("Times New Roman", 12F);
+            label4.Location = new Point(3, 185);
+            label4.Name = "label4";
+            label4.Size = new Size(158, 54);
+            label4.TabIndex = 3;
+            label4.Text = "Дата повышения: квалификации";
+            // 
+            // textBoxName
+            // 
+            textBoxName.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
+            textBoxName.Location = new Point(167, 5);
+            textBoxName.Name = "textBoxName";
+            textBoxName.Size = new Size(250, 27);
+            textBoxName.TabIndex = 4;
+            textBoxName.TextChanged += OnInputChange;
+            // 
+            // textBoxAutobiography
+            // 
+            textBoxAutobiography.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
+            textBoxAutobiography.Location = new Point(167, 43);
+            textBoxAutobiography.Name = "textBoxAutobiography";
+            textBoxAutobiography.Size = new Size(250, 27);
+            textBoxAutobiography.TabIndex = 5;
+            textBoxAutobiography.TextChanged += OnInputChange;
+            // 
+            // customComboBox
+            // 
+            customComboBox.BorderStyle = BorderStyle.FixedSingle;
+            customComboBox.Location = new Point(167, 80);
+            customComboBox.Name = "customComboBox";
+            customComboBox.SelectedItem = "";
+            customComboBox.Size = new Size(250, 91);
+            customComboBox.TabIndex = 6;
+            customComboBox.Enter += OnInputChange;
+            // 
+            // dateBoxWithNull
+            // 
+            dateBoxWithNull.Location = new Point(167, 185);
+            dateBoxWithNull.Name = "dateBoxWithNull";
+            dateBoxWithNull.Size = new Size(278, 45);
+            dateBoxWithNull.TabIndex = 7;
+            // 
+            // buttonCancel
+            // 
+            buttonCancel.Font = new Font("Times New Roman", 12F, FontStyle.Regular, GraphicsUnit.Point, 204);
+            buttonCancel.Location = new Point(339, 249);
+            buttonCancel.Name = "buttonCancel";
+            buttonCancel.Size = new Size(94, 29);
+            buttonCancel.TabIndex = 8;
+            buttonCancel.Text = "Отмена";
+            buttonCancel.UseVisualStyleBackColor = true;
+            buttonCancel.Click += buttonCancel_Click;
+            // 
+            // buttonOK
+            // 
+            buttonOK.Font = new Font("Times New Roman", 12F, FontStyle.Regular, GraphicsUnit.Point, 204);
+            buttonOK.Location = new Point(239, 249);
+            buttonOK.Name = "buttonOK";
+            buttonOK.Size = new Size(94, 29);
+            buttonOK.TabIndex = 9;
+            buttonOK.Text = "OK";
+            buttonOK.UseVisualStyleBackColor = true;
+            buttonOK.Click += buttonOK_Click;
+            // 
+            // FormWorker
+            // 
+            AutoScaleDimensions = new SizeF(8F, 20F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(445, 290);
+            Controls.Add(buttonOK);
+            Controls.Add(buttonCancel);
+            Controls.Add(dateBoxWithNull);
+            Controls.Add(customComboBox);
+            Controls.Add(textBoxAutobiography);
+            Controls.Add(textBoxName);
+            Controls.Add(label4);
+            Controls.Add(label3);
+            Controls.Add(label2);
+            Controls.Add(label1);
+            Name = "FormWorker";
+            Text = "FormWorker";
+            FormClosing += FormWorker_FormClosing;
+            ResumeLayout(false);
+            PerformLayout();
+        }
+
+        #endregion
+
+        private Label label1;
+        private Label label2;
+        private Label label3;
+        private Label label4;
+        private TextBox textBoxName;
+        private TextBox textBoxAutobiography;
+        private BarsukovComponents.VisualComponents.CustomComboBox customComboBox;
+        private KryukovLib.DateBoxWithNull dateBoxWithNull;
+        private Button buttonCancel;
+        private Button buttonOK;
+    }
+}
\ No newline at end of file
diff --git a/CustomComboBox/TestApp/FormWorker.cs b/CustomComboBox/TestApp/FormWorker.cs
new file mode 100644
index 0000000..77e1f1f
--- /dev/null
+++ b/CustomComboBox/TestApp/FormWorker.cs
@@ -0,0 +1,146 @@
+using BusinessLogic;
+using Contracts.BindingModels;
+using Contracts.SearchModels;
+using Contracts.BusinessLogicContracts;
+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 TestApp
+{
+    public partial class FormWorker : Form
+    {
+        private int? _id;
+        private IJobTypeLogic _jobTypeLogic;
+        private IWorkerLogic _workerLogic;
+        private bool _isEdited;
+        public FormWorker(IJobTypeLogic jobTypeLogic, IWorkerLogic workerLogic, int? id = null)
+        {
+            InitializeComponent();
+            _jobTypeLogic = jobTypeLogic;
+            _workerLogic = workerLogic;
+            _id = id;
+            LoadData();
+        }
+
+        private void LoadData()
+        {
+            var list = _jobTypeLogic.ReadList(null);
+            if (list != null)
+            {
+                foreach (var item in list)
+                {
+                    customComboBox.ComboBoxItems.Add(item.Name);
+                }
+            }
+            if (_id.HasValue)
+            {
+                var item = _workerLogic.ReadElement(new WorkerSearchModel
+                {
+                    Id = _id.Value,
+                });
+                textBoxName.Text = item.Name;
+                textBoxAutobiography.Text = item.Autobiography;
+                if (item.DateAdvance == "Повышения квалификации не было")
+                {
+                    dateBoxWithNull.Value = null;
+                }
+                else
+                {
+                    dateBoxWithNull.Value = DateTime.Parse(item.DateAdvance);
+                }
+                customComboBox.SelectedItem = item.JobType;
+                _isEdited = false;
+            }
+        }
+
+        private void OnInputChange(object sender, EventArgs e)
+        {
+            _isEdited = true;
+        }
+
+        private void buttonOK_Click(object sender, EventArgs e)
+        {
+            if (string.IsNullOrEmpty(textBoxName.Text))
+            {
+                MessageBox.Show("Заполните поле ФИО", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+            if (string.IsNullOrEmpty(textBoxAutobiography.Text))
+            {
+                MessageBox.Show("Заполните поле Автобиография", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+            if (string.IsNullOrEmpty(customComboBox.SelectedItem))
+            {
+                MessageBox.Show("Выберите должность", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+            try
+            {
+                string? date = dateBoxWithNull.Value.ToString();
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show("Впишите дату в формате DD.MM.YYYY, либо поставте галочку (в случае, если повышения квалификации не было)", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+
+            _isEdited = false;
+            try
+            {
+                var model = new WorkerBindingModel
+                {
+                    Id = _id ?? 0,
+                    Name = textBoxName.Text,
+                    Autobiography = textBoxAutobiography.Text,
+                    JobType = customComboBox.SelectedItem,
+                    DateAdvance = dateBoxWithNull.Value.ToString() == ""
+                        ? "Повышения квалификации не было"
+                        : dateBoxWithNull.Value.ToString(),
+                };
+                bool result = _id.HasValue ? _workerLogic.Update(model) : _workerLogic.Create(model);
+                if (!result)
+                {
+                    throw new Exception("Error while creating or updating worker");
+                }
+                MessageBox.Show("Сохранено", "Сообщение", MessageBoxButtons.OK, MessageBoxIcon.Information);
+                DialogResult = DialogResult.OK;
+                Close();
+            }
+            catch(Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+        private void FormWorker_FormClosing(object sender, FormClosingEventArgs e)
+        {
+            if (!_isEdited)
+            {
+                return;
+            }
+            var confirmResult = MessageBox.Show(
+                "Вы не сохранили изменения.\nВы действительно хотите выйти?", "Подтвердите действие",
+                MessageBoxButtons.YesNo,
+                MessageBoxIcon.Question
+            );
+
+            if (confirmResult == DialogResult.No)
+            {
+                e.Cancel = true;
+            }
+        }
+
+        private void buttonCancel_Click(object sender, EventArgs e)
+        {
+            DialogResult = DialogResult.Cancel;
+            Close();
+        }
+    }
+}
diff --git a/CustomComboBox/TestApp/FormWorker.resx b/CustomComboBox/TestApp/FormWorker.resx
new file mode 100644
index 0000000..8b2ff64
--- /dev/null
+++ b/CustomComboBox/TestApp/FormWorker.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>
\ No newline at end of file
diff --git a/CustomComboBox/TestApp/Program.cs b/CustomComboBox/TestApp/Program.cs
index 390168f..5831017 100644
--- a/CustomComboBox/TestApp/Program.cs
+++ b/CustomComboBox/TestApp/Program.cs
@@ -30,6 +30,7 @@ namespace TestApp
             services.AddTransient<IWorkerStorage, WorkerStorage>();
             services.AddTransient<FormMain>();
             services.AddTransient<FormJobType>();
+            services.AddTransient<FormWorker>();
         }
     }
 }
\ No newline at end of file
diff --git a/CustomComboBox/TestApp/Transmit.cs b/CustomComboBox/TestApp/Transmit.cs
new file mode 100644
index 0000000..22c6110
--- /dev/null
+++ b/CustomComboBox/TestApp/Transmit.cs
@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace TestApp
+{
+    public class Transmit
+    {
+        public string Id { get; set; }
+        [DisplayName("ФИО")]
+        public string Name { get; set; } = string.Empty;
+        [DisplayName("Автобиография")]
+        public string Autobiography { get; set; } = string.Empty;
+        [DisplayName("Должность")]
+        public string JobType { get; set; } = string.Empty;
+        [DisplayName("Дата повышения квалификации")]
+        public string? DateAdvance { get; set; } = string.Empty;
+    }
+}