I've tried it with binding the Position property of the Containers to the ViewModels' but unfortunately the TileViewItems doesn't respect it. The only solution I came up is resetting the ItemsSource like follows. (Just replace the MainPage.cs)
MainPage : UserControl
.radTileView.ItemsSource = items = MyViewModel.GenerateItems();
sender, RoutedEventArgs e)
item.ContentState = ContentState.NormalContent;
Hope will help you.
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