переопределение

Lab1ContainersShip/Lab1ContainersShip/FormShipCollection.cs

@@ -32,7 +32,7 @@ DrawningObjectShip>(pictureBoxCollection.Width, pictureBoxCollection.Height);
             FormContainerShip form = new FormContainerShip();
             if (form.ShowDialog() == DialogResult.OK)
             {
-                if (_ships + form.SelectedShip)
+                if (_ships + form.SelectedShip != -1)
                 {
                     MessageBox.Show("Объект добавлен");
                     pictureBoxCollection.Image = _ships.ShowShips();

Lab1ContainersShip/Lab1ContainersShip/SetGeneric.cs

@@ -9,6 +9,7 @@ namespace Lab1ContainersShip
 {
     public class SetGeneric<T>
         where T : class
+       
     {
         // <summary>
         /// Массив объектов, которые храним
@@ -31,7 +32,7 @@ namespace Lab1ContainersShip
         /// </summary>
         /// <param name="car">Добавляемый автомобиль</param>
         /// <returns></returns>
-        public bool Insert(T ship)
+        public int Insert(T ship)
         {
             // TODO вставка в начало набора
             int temp = 0;
@@ -44,7 +45,7 @@ namespace Lab1ContainersShip
             }
             if (k == _places.Length)
             {
-                return false;
+                return -1;
             }
             else
             {
@@ -63,7 +64,7 @@ namespace Lab1ContainersShip
 
                 }
                 _places[0] = ship;
-                return true;
+                return 0;
             }
         }
         /// <summary>
@@ -155,6 +156,6 @@ namespace Lab1ContainersShip
                 return null;
             }
         }
-
+        
     }
 }

Lab1ContainersShip/Lab1ContainersShip/ShipGenericCollection.cs

@@ -52,14 +52,14 @@ namespace Lab1ContainersShip
         /// <param name="collect"></param>
         /// <param name="obj"></param>
         /// <returns></returns>
-        public static bool operator +(ShipGenericCollection<T, U> collect, T
+        public static int operator +(ShipGenericCollection<T, U> collect, T
         obj)
         {
             if (obj == null)
             {
-                return false;
+                return -1;
             }
-            return collect?._collection.Insert(obj) ?? false;
+            return collect?._collection.Insert(obj) ?? -1;
         }
         /// <summary>
         /// Перегрузка оператора вычитания