title: How can I create a route constraint of type System.Guid?
body: <p>Can anyone point me in the right direction on how to map a route which requires two guids?</p>
  
  <p>ie. <a href="http://blah.com/somecontroller/someaction/" rel="noreferrer">http://blah.com/somecontroller/someaction/</a>{firstGuid}/{secondGuid}</p>
  
  <p>where both firstGuid and secondGuid are not optional and must be of type system.Guid?</p>