ScatterviewItem 뒤에 검은색 백그라운드 쉐도우 없애기

ScatterViewItem svi = new ScatterViewItem();
svi.Background = new SolidColorBrush(Colors.Transparent);
svi.ShowsActivationEffects = false;
svi.BorderBrush = System.Windows.Media.Brushes.Transparent;

RoutedEventHandler loadedEventHandler = null;
loadedEventHandler = new RoutedEventHandler(delegate
{
    svi.Loaded -= loadedEventHandler;
    Microsoft.Surface.Presentation.Generic.SurfaceShadowChrome ssc;
    ssc = svi.Template.FindName("shadow", svi) as Microsoft.Surface.Presentation.Generic.SurfaceShadowChrome;
    ssc.Visibility = Visibility.Hidden;
});
svi.Loaded += loadedEventHandler;

참고 : http://stackoverflow.com/questions/4602013/removing-shadow-from-scatterviewitem-isnt-working