private void DiffEditor_Click(object sender, RoutedEventArgs e) { if (this.tracker == null) { return; } var selectionPosition = this.GetEditorSelectionPosition(); var hasChanges = tracker.HasChanges(diffLines, selectionPosition[0], selectionPosition[1]); btnResetSelected.Visibility = btnStageSelected.Visibility = btnUnStageSelected.Visibility = (hasChanges ? Visibility.Visible : Visibility.Collapsed); }