private static void OnIsMarqueeAnimationRunningChanged(DependencyObject sender, DependencyPropertyChangedEventArgs args)
        {
            MarqueeTextBlock userControl = sender as MarqueeTextBlock;

            userControl.UpdateAnimationRunning();
        }
        private static void OnMarqueeTextChanged(DependencyObject sender, DependencyPropertyChangedEventArgs args)
        {
            MarqueeTextBlock userControl = sender as MarqueeTextBlock;

            userControl.OnMarqueeTextChanged();
        }