title: MVC Html.ActionLink doesn't work after upgrade from .net 3.5 to 4.0
body: <p>Well as the title says, I have a project with a bunch of Html.ActionLink</p>
  
  <pre><code>&lt;%= Html.ActionLink("Reason for booking", "BookingReason")%&gt;
  </code></pre>
  
  <p>I have upgraded the project to .net 4.0 and they no longer render a link to the action.  Its just a blank  of course causing the page to reload.</p>
  
  <p>The Html.ActionLink tags are in a user control (ascx) in the Shared folder of an Area.</p>
  
  <p>I tried downgrading again to .net 3.5 and it works - weird.  any ideas?</p>
  
  <p>Thx</p>