private void DeleteButton_Click(object sender, RoutedEventArgs e) { Button button = sender as System.Windows.Controls.Button; Prefix user = button.DataContext as Prefix; if (MessageBox.Show("Are you sure you want to delete " + user.Pre + " ?", "Confirmation", MessageBoxButton.YesNo) == MessageBoxResult.Yes) { user.Delete(user.Id.ToString()); Refresh(); } else { return; } }