title: Razor intellisense & external assemblies
body: <p>I have an external assembly named T4MVCExtensions which is using the System.Web.Mvc namespace.
  So the classes within this assembly are in the System.Web.Mvc namespace.</p>
  
  <p>In my project I have a view and I am trying to use extension methods which reside in this assembly.</p>
  
  <p>The System.Web.Mvc namespace has been added (by default) to the config file.</p>
  
  <p>The view cannot provide intellisense for these extension methods (with red underline), but it compiles without runtime extensions.</p>
  
  <p>How can I make sure that intellisense works correctly?</p>