private void BtnDelete_Click(object sender, RoutedEventArgs e) { if (string.IsNullOrEmpty(TbCode.Text)) { return; } var cliente = new Customers(Convert.ToInt32(TbCode.Text), TbName.Text, "", "", ""); if (!_myCustomersManager.ItHasBills(cliente)) { _myCustomersManager.Delete(cliente); LblInfo.Content = Properties.Resources.CORRECT_DELETE; } else { LblInfo.Content = Properties.Resources.NO_POSIBLE_DELETE_CUSTOMER; } ControlsClear(); }