private void can_Delete_MouseDown(object sender, MouseButtonEventArgs e)
        {
            connect = new CTUConnection(); // refreshens the 'Connection' class //

            try
            {
                connect.DeleteOldVehicle(int.Parse(ID));
                connect.SelectOldVehicle();
                DGV_Used_DemoCar.ItemsSource = connect.table.DefaultView;
            }

            catch (Exception)
            {
            }
        }