private void lbxFeedItems_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
SelectedFeedItem = e.AddedItems.Count > 0 ? e.AddedItems.Cast<FeedItem>().First() : null;
scrFeedItem.Visibility = SelectedFeedItem != null ? Visibility.Visible : Visibility.Collapsed;
}
public FeedItemViewer(FeedItem feedItem)
{
FeedItem = feedItem;
InitializeComponent();
}