private static void OnContentChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
 {
     KeyTipAndContentSyncHelper.OnContentPropertyChanged((ISyncKeyTipAndContent)d, ContentProperty);
 }
 private static object CoerceContent(DependencyObject d, object baseValue)
 {
     return(KeyTipAndContentSyncHelper.CoerceContentProperty((ISyncKeyTipAndContent)d, baseValue));
 }
 internal void SyncKeyTipAndContent()
 {
     KeyTipAndContentSyncHelper.Sync(this, ContentProperty);
 }