title: How significant is .NET 3.5 SP1 for WCF/REST?
body: <p>I just worked through a <a href="http://tanguay.info/web/index.php?pg=books&amp;id=6" rel="nofollow noreferrer">book on WCF</a> and was surprised that it didn't even mention REST at all.</p>
  
  <p>Was REST an afterthought for WCF that was added in .NET 3.5 SP1 and hence not baked in well or is it well integrated?</p>
  
  <p>I assume that Silverlight and XBAPs can consume WCF with no problem or do they have some limitation due to their sandbox environments? I've been reading that some people are having <a href="http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/dee3b9b3-975c-4372-b61a-779ce8f0c351/" rel="nofollow noreferrer">problems getting WCF to play well with XBAP</a> and I would assume there are similar problems with Silverlight.</p>