title: How to get a list of classes with 0 references from CodeLens
body: <p>I have a very big EF edmx model with over 450 classes/entities.  This has grown organically over the last 5 years.  With Visual Studio 2013 and the CodeLens feature I have noticed that some classes have 0 references listed.  When I do some research I have found that this is true and I can remove that entity from the model.</p>
  
  <p>The problem is that I would have to look at all 450 classes in the edmx to see if CodeLens says there are 0 references.  Is there any report, export that I can get with CodeLens?  Is there any way to extend it to provide this if there is no report?</p>