void ItemsSource_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
 {
     if (e.Action == NotifyCollectionChangedAction.Reset)
     {
         return;
     }
     Clvw.ImportItemsSource(ItemsSource as IList);
 }
 void CatrobatListView_Loaded(object sender, RoutedEventArgs e)
 {
     Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
     {
         Clvw.ImportItemsSource((IList)ItemsSource);
         ItemsSource.CollectionChanged += ItemsSource_CollectionChanged;
         Clvw.LayoutUpdated            += Clvw_LayoutUpdated;
     });
 }