/// <summary> /// HeaderProperty property changed handler. /// </summary> /// <param name="d"> /// HeaderedItemsControl that changed its Header. /// </param> /// <param name="e">Event arguments.</param> private static void OnHeaderPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) { HeaderedItemsControl source = d as HeaderedItemsControl; source.OnHeaderChanged(e.OldValue, e.NewValue); }