private void ButtonDeleteAmbulance_Click(object sender, RoutedEventArgs e) { var item = (Ambulance)dataGridAmbulances.SelectedItem; if (item == null) { return; } if (MessageBox.Show("Do you want to delete this Amb?", "Delete", MessageBoxButton.YesNo, MessageBoxImage.Warning) == MessageBoxResult.Yes) { ambulance.Delete(item.Id); GetAmbulances(); } }