title: MVVM light - how to access property in other view model
body: <p>I'm using mvvm light to build a Silverlight application.
  Is there a code snippet that shows how to access a view model's property or command from within another view model or user control's code behind?</p>
  
  <p>I guess it's simple, but I somehow missed something.</p>
  
  <p>Ueli</p>