Animation height of ItemsControl in windows 8 trough code

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XAML

Win8

In Win8 app I am trying animation height of ItemsControl. It worked through XAML with the help of this post, but when I tried through code it not happening. Am I missing something?

private static void AnimateSection(ItemsControl itemsControl, double fromHeight, double toHeight)
{
    var animate = new Storyboard ();
    var showHideContent = new DoubleAnimation { Duration = new Duration(TimeSpan.FromSeconds(1)) };

    showHideContent.From = fromHeight;
    showHideContent.To = toHeight;
    Storyboard.SetTarget(showHideContent, itemsControl);
    Storyboard.SetTargetProperty(showHideContent, "Height");
    Timeline.AllowDependentAnimations = true;
    animate.Children.Add(showHideContent);

    animate.Begin();
}