wpf MarginProperty Animation

	    ThicknessAnimation marginAnimation = new ThicknessAnimation();
            marginAnimation.From = new Thickness(10, 0, 0, 0);
            marginAnimation.To = new Thickness(0, this.Height, 0, 0);
            marginAnimation.Duration = TimeSpan.FromSeconds(5);
            grid.BeginAnimation(Grid.MarginProperty, marginAnimation);