private static void OnFontOptionsSourceChanged(DependencyObject dependencyObject, FrameworkElement oldFrameworkElement, FrameworkElement newFrameworkElement)
{
var textBlock = (TextBlock)dependencyObject;
if (newFrameworkElement != null)
{
SetFontOptions(textBlock, FontOptions.FromElement(newFrameworkElement));
}
else
{
textBlock.ClearValue(FontOptionsProperty);
}
}
