protected override void OnDisappearing()
{
base.OnDisappearing();
MessagingCenter.Unsubscribe <IKeyEventSender, string>(this, "KeyDown");
MessagingCenter.Unsubscribe <IEventSender, string>(this, "Pop");
_contentGridController.Unsubscribe();
}
void OnHotReloaded()
{
_contentGridController?.Unsubscribe();
_contentGridController = new ContentGridController(ContentGrid);
_contentGridController.SetItemsSource(ContentDataList as List <DetailContentData>);
_contentGridController.Subscribe();
_contentGridController.SetFocusedContent(FocusedContent as DetailContentData);
UpdateContentInfo();
}