title: asp.net mvc with .net 4.0
body: <p>Ok...</p>
  
  <p>I am currently upgrading a project from asp.net 3.5 using asp.net mvc 2.0.</p>
  
  <p>Im having a number of issues regarding namespace conflicts and other such lovely stuff.</p>
  
  <p>I was hoping someone could shed some light on a few things...</p>
  
  <ol>
  <li><p>The system.web.routing 4.0 and system.web.abstractions 4.0 libraries are empty, what's the motivation here?</p></li>
  <li><p>The system.web 4.0 library isnt in the GAC, and has all the namespaces from the routing and abstractions library, how are we meant to be referencing system.web 4.0?</p></li>
  <li><p>Has anyone recompiled asp.net mvc against 4.0 yet?</p></li>
  </ol>
  
  <p>Cheers (and frustrated)</p>
  
  <p>Byron</p>