Исправил, готово

AntiAirCraftGun/AntiAirCraftGun/FormAntiAirCraftGunCollection.cs

@@ -106,7 +106,7 @@ namespace AntiAircraftGun
             FormAntiAirCraftGun form = new();
             if (form.ShowDialog() == DialogResult.OK)
             {
-                if (obj + form.SelectedZenit)
+                if ((obj + form.SelectedZenit)==1)
                 {
                     MessageBox.Show("Объект добавлен");
                     pictureBoxCollection.Image = obj.ShowZenits();

AntiAirCraftGun/AntiAirCraftGun/Generics/AntiAirCraftGunGenericCollection.cs

@@ -51,31 +51,26 @@ namespace AntiAircraftGun.Generics
         /// <param name="collect"></param>
         /// <param name="obj"></param>
         /// <returns></returns>
-        public static bool operator +(AntiAirCraftGunGenericCollection<T, U> collect, T? obj)
+        public static int operator +(AntiAirCraftGunGenericCollection<T,U> collect, T? obj)
         {
             if (obj == null)
-            {
-                MessageBox.Show("Объект пустой. Невозможно добавить.");
-                return false;
+                return -1;
+            return collect?._collection.Insert(obj) ?? -1;
         }
-            return collect?._collection.Insert(obj) ?? false;
-        }
-
         /// <summary>
         /// Перегрузка оператора вычитания
         /// </summary>
         /// <param name="collect"></param>
         /// <param name="pos"></param>
         /// <returns></returns>
-        public static T? operator -(AntiAirCraftGunGenericCollection<T, U> collect, int pos)
+        public static bool operator -(AntiAirCraftGunGenericCollection<T, U> collect, int pos)
         {
-            T? obj = collect._collection[pos];
+        T? obj = collect._collection.Get(pos);
         if (obj != null)
-            {
-                collect._collection.Remove(pos);
-            }
-            return obj;
+            return collect._collection.Remove(pos);
+        return false;
         }
+        
         /// <summary>
         /// Получение объекта IMoveableObject
         /// </summary>
@@ -156,9 +151,21 @@ namespace AntiAircraftGun.Generics
                     if (y + distance_between_objects >= maxY)
                     {
                         y = 0;
-                        x += obj.GetWidth + 10 + _placeSizeWidth;
+                        x += _placeSizeWidth;
                     }
                 }
+                if (obj == null) 
+                {
+                    // Увеличиваем координату Y для следующего объекта
+                    y += distance_between_objects;
+
+                    // Проверяем, если Y достигло максимума, изменяем X и сбрасываем Y
+                    if (y+distance_between_objects >= maxY)
+                    {
+                        y = 0;
+                        x += _placeSizeWidth;
+                    }
+                };
             }
         }
     }

AntiAirCraftGun/AntiAirCraftGun/Generics/SetGeneric.cs

@@ -35,21 +35,21 @@ namespace AntiAircraftGun.Generics
         /// </summary>
         /// <param name="car">Добавляемый автомобиль</param>
         /// <returns></returns>
-        public bool Insert(T car)
+        public int Insert(T car)
         {
             if (_places.Count == _maxCount)
-                return false;
+                return -1;
             Insert(car, 0);
-            return true;
+            return 1;
 
         }
 
-        public bool Insert(T car, int position)
+        public int Insert(T car, int position)
         {
             if (!(position >= 0 && position <= Count && _places.Count < _maxCount))
-                return false;
+                return -1;
             _places.Insert(position, car);
-            return true;
+            return 1;
         }
 
         /// <summary>