title: Web API 2 Attribute Routing Clash
body: <p>I'm having issues getting my head around how route selection works.  I have two route attributes set which are clashing with each other.
  They Are</p>
  
  <pre><code>[Route("{apikey}/Parent/{parentID}/Children/ChildrenDataFormat")]
  [Route("{apikey}/Parent/{parentID}/{dataSelectionTypeA}/{dataSelectionTypeB}")]
  </code></pre>
  
  <p>The first route's last two parts are hard coded and will never change.  The second route will bind into the method parameters.</p>
  
  <p>If I remove the second route then the first route works fine but otherwise I get a 404.  I presume the Route Matching is seeing a Guid followed by "Parent" and then ignoring the fact that "Children" and "ChildrenDataFormat" should be present and instead seeing 3 things follow so route 2 is a match.</p>
  
  <p>If this a correct assumption and is there an obvious fix to make this work?</p>