title: WPF - Animating gridlength in XAML
body: <p>I was just wondering if it's possible to animate the height of a grid using purely XAML? I looked at this tutorial: 
  <a href="http://windowsclient.net/learn/video.aspx?v=70654" rel="nofollow noreferrer">http://windowsclient.net/learn/video.aspx?v=70654</a> </p>
  
  <p>But it seems as though one need to write custom functions for this to work. 
  Can it be done just by XAML purely?</p>