public void EditListItems()
{
List <IWidget> list = new List <IWidget>();
list.Add(IWidget);
StoreOldItems();
EditListWindow win = new EditListWindow(list);
win.Owner = Application.Current.MainWindow;
bool?bRValue = win.ShowDialog();
if ((bool)bRValue)
{
LoadList();
EditListCommand cmd = new EditListCommand(this, OldItems, IWidget.Items);
CurrentUndoManager.Push(cmd);
ClearOldItems();
}
}