title: WebImage class missing on MVC 4
body: <p>I've been developing a MVC 4 web app but I couldn't find where is the reference to WebImage. I also added a reference to "System.Web.Helpers". I'm inside a Controller and there is no shortcut or even helps/tips to find this class.</p>
  
  <pre><code>public ActionResult Images()
  {
      WebImage w
  }
  </code></pre>
  
  <p>What am I missing?</p>