private void BtnDeleteAdministrator_Click(object sender, RoutedEventArgs e) { if (!Validation()) { return; } if (MessageBox.Show("Do you want to delete this Administrator?", "Question", MessageBoxButton.YesNo, MessageBoxImage.Information) == MessageBoxResult.Yes) { dr.DeleteAdministrator(ad.Id); ResetTextBox(); btnAddAdministrator.Visibility = Visibility.Visible; btnUpdateAdministrator.Visibility = Visibility.Hidden; btnDeleteAdministrator.Visibility = Visibility.Hidden; FillDG(); } }