не понятно как добавить мануфактуру

Laba3/ManufacturerForm.Designer.cs

@@ -28,12 +28,36 @@
         /// </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 = "ManufacturerForm";
+            dataGridView = new DataGridView();
+            ((System.ComponentModel.ISupportInitialize)dataGridView).BeginInit();
+            SuspendLayout();
+            // 
+            // dataGridView
+            // 
+            dataGridView.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
+            dataGridView.Location = new Point(12, 12);
+            dataGridView.Name = "dataGridView";
+            dataGridView.RowHeadersWidth = 51;
+            dataGridView.Size = new Size(776, 426);
+            dataGridView.TabIndex = 0;
+            dataGridView.CellValueChanged += dataGridView_CellValueChanged;
+            dataGridView.UserAddedRow += dataGridView_UserAddedRow;
+            dataGridView.UserDeletingRow += dataGridView_UserDeletingRow;
+            // 
+            // ManufacturerForm
+            // 
+            AutoScaleDimensions = new SizeF(8F, 20F);
+            AutoScaleMode = AutoScaleMode.Font;
+            ClientSize = new Size(800, 450);
+            Controls.Add(dataGridView);
+            Name = "ManufacturerForm";
+            Text = "ManufacturerForm";
+            ((System.ComponentModel.ISupportInitialize)dataGridView).EndInit();
+            ResumeLayout(false);
         }
 
         #endregion
+
+        private DataGridView dataGridView;
     }
 }

Laba3/ProductForm.cs

@@ -31,6 +31,7 @@ namespace Laba3
             _isNewProduct = product == null;
             txtName.MinLength = MINL;
             txtName.MaxLength = MAXL;
+            //TODO dtpDeliveryDate.DateF
 
             if (!_isNewProduct)
             {

Laba3/Program.cs

@@ -1,3 +1,6 @@
+using Data.Repositories;
+using Data;
+
 namespace Laba3
 {
     internal static class Program
@@ -10,8 +13,13 @@ namespace Laba3
         {
             // To customize application configuration such as set high DPI settings or default font,
             // see https://aka.ms/applicationconfiguration.
-            ApplicationConfiguration.Initialize();
-            Application.Run(new MainForm());
+            // Ñîçäàíèå ýêçåìïëÿðîâ ðåïîçèòîðèåâ
+            var dbContext = new ApplicationDbContext();
+            var productRepository = new ProductRepository(dbContext);
+            var manufacturerRepository = new ManufacturerRepository(dbContext);
+
+            // Ïåðåäà÷à ðåïîçèòîðèåâ â êîíñòðóêòîð MainForm
+            Application.Run(new MainForm(productRepository, manufacturerRepository));
         }
     }
 }