private void Storyboard_Loaded(object sender, RoutedEventArgs e)
{
this.Loaded -= Storyboard_Loaded;
var frame = VisualTreeHelperEx.FindVisualParents <Frame>(this).FirstOrDefault();
if (frame != null)
{
mangedTabItem = frame.Parent as ClosableTabItem;
mangedTabItem.Closed += MangedTabItem_Closed;
}
}