title: TagBuilder gone from MVC 3 beta to RC
body: <p>What happened to the <code>TagBuilder</code> class between ASP.NET MVC 3 beta and RC?</p>
  
  <p>When compiling my project I get the error:</p>
  
  <blockquote>
    <p>The type name 'TagBuilder' could not be found. This type has been forwarded to assembly 'System.Web.WebPages, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. Consider adding a reference to that assembly.</p>
  </blockquote>
  
  <p>However that assembly does not exist in the GAC (nor in the <em>.NET</em> tab of the <em>Add References</em> dialog.)  A search of my HDD doesn't turn up a DLL with that name either.</p>