public void ChangeFormExecuted(object sender, ExecutedRoutedEventArgs e) { var f = new AddChangeSynWindow("Изменение формы слова", "Форма:", _selectedSynonym, _selectedWordForm, false); if (f.ShowDialog() != true) { return; } try { _namedNode.ChangeWordForm(_selectedSynonym, _selectedWordForm, f.NewWord); SetDataContext(); } catch (ArgumentException ex) { MessageBox.Show(ex.Message); } }