последний вариант

AirFighter/AirFighter/Entities/EntityAirFighter.cs

@@ -7,7 +7,7 @@ public class EntityAirFighter : EntityMilitaryAircraft
 {
     public Color AdditionalColor { get; private set; }
 
-    public void ChooseAdditionalColor(Color additionalColor)
+    public void SetAdditionalColor(Color additionalColor)
     {
         AdditionalColor = additionalColor;
     }

AirFighter/AirFighter/Entities/EntityMilitaryAircraft.cs

@@ -11,7 +11,7 @@ public class EntityMilitaryAircraft
 
     public Color BodyColor { get; private set; }
 
-    public void ChooseBodyColor(Color bodyColor)
+    public void SetBodyColor(Color bodyColor)
     {
         BodyColor = bodyColor;
     }

AirFighter/AirFighter/FormMilitaryAircraftConfig.Designer.cs

@@ -163,21 +163,21 @@
             // checkBoxRockets
             // 
             checkBoxRockets.AutoSize = true;
-            checkBoxRockets.Location = new Point(12, 154);
+            checkBoxRockets.Location = new Point(6, 154);
             checkBoxRockets.Name = "checkBoxRockets";
-            checkBoxRockets.Size = new Size(318, 24);
+            checkBoxRockets.Size = new Size(339, 24);
             checkBoxRockets.TabIndex = 7;
-            checkBoxRockets.Text = "Признак наличия дополнительных ракет";
+            checkBoxRockets.Text = "Признак наличия дополнительных крыльев";
             checkBoxRockets.UseVisualStyleBackColor = true;
             // 
             // checkBoxWings
             // 
             checkBoxWings.AutoSize = true;
-            checkBoxWings.Location = new Point(12, 124);
+            checkBoxWings.Location = new Point(6, 124);
             checkBoxWings.Name = "checkBoxWings";
-            checkBoxWings.Size = new Size(339, 24);
+            checkBoxWings.Size = new Size(318, 24);
             checkBoxWings.TabIndex = 6;
-            checkBoxWings.Text = "Признак наличия дополнительных крыльев";
+            checkBoxWings.Text = "Признак наличия дополнительных ракет";
             checkBoxWings.UseVisualStyleBackColor = true;
             // 
             // numericUpDownWeight
@@ -282,27 +282,29 @@
             // 
             // labelAdditionalColor
             // 
+            labelAdditionalColor.AllowDrop = true;
             labelAdditionalColor.BorderStyle = BorderStyle.FixedSingle;
-            labelAdditionalColor.Location = new Point(100, 12);
+            labelAdditionalColor.Location = new Point(100, 9);
             labelAdditionalColor.Name = "labelAdditionalColor";
-            labelAdditionalColor.Size = new Size(88, 24);
+            labelAdditionalColor.Size = new Size(88, 36);
             labelAdditionalColor.TabIndex = 2;
             labelAdditionalColor.Text = "Доп. цвет";
             labelAdditionalColor.TextAlign = ContentAlignment.MiddleCenter;
-            labelAdditionalColor.DragDrop += LabelColor_DragDrop;
+            labelAdditionalColor.DragDrop += LabelColors_DragDrop;
-            labelAdditionalColor.DragEnter += LabelColor_DragEnter;
+            labelAdditionalColor.DragEnter += LabelColors_DragEnter;
             // 
             // labelBodyColor
             // 
+            labelBodyColor.AllowDrop = true;
             labelBodyColor.BorderStyle = BorderStyle.FixedSingle;
-            labelBodyColor.Location = new Point(3, 12);
+            labelBodyColor.Location = new Point(3, 9);
             labelBodyColor.Name = "labelBodyColor";
-            labelBodyColor.Size = new Size(88, 24);
+            labelBodyColor.Size = new Size(88, 36);
             labelBodyColor.TabIndex = 1;
             labelBodyColor.Text = "Цвет";
             labelBodyColor.TextAlign = ContentAlignment.MiddleCenter;
-            labelBodyColor.DragDrop += LabelColor_DragDrop;
+            labelBodyColor.DragDrop += LabelColors_DragDrop;
-            labelBodyColor.DragEnter += LabelColor_DragEnter;
+            labelBodyColor.DragEnter += LabelColors_DragEnter;
             // 
             // FormMilitaryAircraftConfig
             // 

AirFighter/AirFighter/FormMilitaryAircraftConfig.cs

@@ -40,16 +40,9 @@ public partial class FormMilitaryAircraftConfig : Form
     /// </summary>
     /// <param name="militaryAircraftDelegate"></param>
     public void AddEvent(Action<DrawningMilitaryAircraft> militaryAircraftDelegate)
-    {
-        if (MilitaryAircraftDelegate == null)
-        {
-            MilitaryAircraftDelegate = militaryAircraftDelegate;
-        }
-        else
     {
         MilitaryAircraftDelegate += militaryAircraftDelegate;
     }
-    }
 
     /// <summary>
     /// Прорисовка объекта
@@ -71,8 +64,6 @@ public partial class FormMilitaryAircraftConfig : Form
     /// <param name="e"></param>
     private void LabelObject_MouseDown(object sender, MouseEventArgs e)
     {
-        //var label = sender as Label;
-        //label.DoDragDrop(label.Name, DragDropEffects.Move);
         (sender as Label)?.DoDragDrop((sender as Label)?.Name ?? string.Empty, DragDropEffects.Move | DragDropEffects.Copy);
     }
 
@@ -83,14 +74,7 @@ public partial class FormMilitaryAircraftConfig : Form
     /// <param name="e"></param>
     private void PanelObject_DragEnter(object sender, DragEventArgs e)
     {
-        if (e.Data?.GetDataPresent(DataFormats.Text) ?? false)
+        e.Effect = e.Data?.GetDataPresent(DataFormats.Text) ?? false ? DragDropEffects.Copy : DragDropEffects.None;
-        {
-            e.Effect = DragDropEffects.Copy;
-        }
-        else
-        {
-            e.Effect = DragDropEffects.None;
-        }
     }
 
     /// <summary>
@@ -118,7 +102,7 @@ public partial class FormMilitaryAircraftConfig : Form
     /// </summary>
     /// <param name="sender"></param>
     /// <param name="e"></param>2
-    private void Panel_MouseDown(object? sender, MouseEventArgs e)
+    private void Panel_MouseDown(object sender, MouseEventArgs e)
     {
         (sender as Panel)?.DoDragDrop((sender as Panel)?.BackColor, DragDropEffects.Move | DragDropEffects.Copy);
     }
@@ -132,17 +116,8 @@ public partial class FormMilitaryAircraftConfig : Form
     /// </summary>
     /// <param name="sender"></param>
     /// <param name="e"></param>
-    private void LabelColor_DragEnter(object sender, DragEventArgs e)
+    private void LabelColors_DragEnter(object sender, DragEventArgs e)
     {
-        //if (e.Data?.GetDataPresent(typeof(Color)) ?? false)
-        //{
-        //    e.Effect = DragDropEffects.Copy;
-        //}
-        //else
-        //{
-        //    e.Effect = DragDropEffects.None;
-        //}
-
         e.Effect = e.Data?.GetDataPresent(typeof(Color)) ?? false ? DragDropEffects.Copy : DragDropEffects.None;
     }
 
@@ -151,27 +126,28 @@ public partial class FormMilitaryAircraftConfig : Form
     /// </summary>
     /// <param name="sender"></param>
     /// <param name="e"></param>
-    private void LabelColor_DragDrop(object sender, DragEventArgs e)
+    private void LabelColors_DragDrop(object sender, DragEventArgs e)
     {
         if (_militaryAircraft == null)
         {
             return;
         }
         Label label = (Label)sender;
-        switch (((Label)sender).Name)
+        Color newColor = (Color)e.Data.GetData(typeof(Color).ToString());
+        switch (label.Name)
         {
             case "labelBodyColor":
-                _militaryAircraft.EntityMilitaryAircraft.ChooseBodyColor((Color)e.Data.GetData(typeof(Color)));
+                _militaryAircraft.EntityMilitaryAircraft.SetBodyColor(newColor);
+                DrawObject();
                 break;
             case "labelAdditionalColor":
                 if (_militaryAircraft is DrawningAirFighter)
                 {
-                    return;
+                    (_militaryAircraft.EntityMilitaryAircraft as EntityAirFighter).SetAdditionalColor(newColor);
+                    DrawObject();
                 }
-                 (_militaryAircraft.EntityMilitaryAircraft as EntityAirFighter).ChooseAdditionalColor((Color)e.Data.GetData(typeof(Color)));
                 break;
         }
-        DrawObject();
     }