Sailboat/Sailboat/BoatsGenericCollection.cs

@@ -74,7 +74,10 @@ namespace Sailboat.Generics
         public static T? operator -(BoatsGenericCollection<T, U> collect, int pos)
         {
             T? obj = collect._collection[pos];
-            collect._collection.Remove(pos);
+            if (obj != null)
+            {
+                collect._collection.Remove(pos);
+            }
             return obj;
         }
 

Sailboat/Sailboat/BoatsGenericStorage.cs

@@ -184,6 +184,5 @@ namespace Sailboat.Generics
                 }
             }
         }
-
     }
 }

Sailboat/Sailboat/FormBoatCollection.cs

@@ -130,8 +130,6 @@ namespace Sailboat
                 MessageBox.Show(ex.Message);
                 _logger.LogWarning($"{ex.Message} из набора {listBoxStorages.SelectedItem.ToString()}");
             }
-
-
         }
 
         private void buttonRefreshCollection_Click(object sender, EventArgs e)
@@ -147,7 +145,6 @@ namespace Sailboat
                 return;
             }
             pictureBoxCollection.Image = obj.ShowBoats();
-
         }
 
         private void buttonAddObject_Click(object sender, EventArgs e)
@@ -222,6 +219,5 @@ namespace Sailboat
                 }
             }
         }
-
     }
 }