title: How to add a Basic Authentication header to a MediaElement's Source request to a secure URL resource?
body: <p>In my Silverlight applicatin, I am using Basic Authentication to communicate with my WCF Web Services. Everything works great, until my MediaElement attempts to request a video of a secure URL resource. I get the authentication dialog.</p>
  
  <p>Ideally, I would like to include the UID/PWD in the Authorization header of the MediaElement's request, but I do not know how to do this.</p>
  
  <p>If this is not possible, how else can I restrict the access of the media element to only my application for the user logged in?</p>