public void BeginMovingText(string text)
        {
              
            textBlockMessageString.Text = text;

            this.UpdateLayout();
            
            animation.From =new Thickness(this.ActualWidth,0,0,12);
            animation.To = new Thickness(-textBlockMessageString.ActualWidth,0,0,12);
            animation.Duration = new Duration(TimeSpan.FromMilliseconds((textBlockMessageString.ActualWidth + this.ActualWidth) / 0.2));
  
            storyboard.Children.Add(animation);
            Storyboard.SetTarget(animation, textBlockMessageString);
            Storyboard.SetTargetProperty(animation, new PropertyPath(TextBlock.MarginProperty));

            storyboard.Begin(); 
        }