private void back(object sender, RoutedEventArgs e) { if ((partie._essai > 0) && (partie.pile.Count > 0)) { partie.depiler(); ecrire(); partie._essai--; if (partie.go) { ws_Copy.Visibility = Visibility.Hidden; partie.go = false; } ecrire(); } else { backb.IsEnabled = false; } nb.Content = partie._essai.ToString(); }