public override void OnApplyRequestedTheme(ElementTheme requestedTheme)
{
var elementType = AttachedFrameworkElement.GetType();
var style = RequestedThemeFactory.Current.Create(elementType, requestedTheme);
AttachedFrameworkElement.SetValue(FrameworkElement.StyleProperty, style);
AttachedFrameworkElement.UpdateLayout();
AttachedFrameworkElement.UpdateDefaultStyle();
OnApplyTemplate();
ChangeVisualState(true);
}
