private void cmdUpdate_Click(object sender, RoutedEventArgs e)
        {
            Cursor = Cursors.Wait;
            List <string> lstGenres = (from CheckBox item in RootPanel.Children
                                       where item.IsChecked == true
                                       select item.Content.ToString()).ToList();

            foreach (ThumbItem item in _items)
            {
                IMyCollectionsData entity = _service.Get(item.Id);
                GenreServices.UnlinkGenre(entity);
                GenreServices.AddGenres(lstGenres, entity, true);
            }

            Close();
            Cursor = null;
        }