title: How do I read an Image's Height and Width from my View Model?
body: <p>I want to do some line-drawing operations from my ViewModel (i.e. I will add to a collection of Lines which are bound to an <code>ItemsControl</code> on my view).</p>
  
  <p>For this I need to know the height and width of an <code>Image</code> in my view. How do I get them ?</p>
  
  <p>There are some workarounds mentioned in some other SO posts but <a href="https://stackoverflow.com/questions/1083224/pushing-read-only-gui-properties-back-into-viewmodel?answertab=active#tab-top">they are for WPF</a> and none of them work on Metro.</p>