Lab1ContainersShip/Lab1ContainersShip/FormShipCollection.cs

@@ -53,7 +53,7 @@ MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.No)
                 return;
             }
             int pos = Convert.ToInt32(maskedTextBoxNumber.Text);
-            if (_ships - pos != null)
+            if (!(_ships - pos))
             {
                 MessageBox.Show("Объект удален");
                 pictureBoxCollection.Image = _ships.ShowShips();

Lab1ContainersShip/Lab1ContainersShip/ShipGenericCollection.cs

@@ -67,15 +67,15 @@ namespace Lab1ContainersShip
         /// <param name="collect"></param>
         /// <param name="pos"></param>
         /// <returns></returns>
-        public static T operator -(ShipGenericCollection<T, U> collect, int
+        public static bool operator -(ShipGenericCollection<T, U> collect, int
         pos)
         {
             T obj = collect._collection.Get(pos);
             if (obj != null)
             {
-                collect._collection.Remove(pos);
+                return collect._collection.Remove(pos);
             }
-            return obj;
+            return false;
         }
         /// <summary>
         /// Получение объекта IMoveableObject