title: Check on Facebook #_=_ snipped in URL
body: <p>I'm using Facebook authentication on my site. On redirect Facebook appends this to my URL <code>#_=_</code>, e.g. <code>http://www.example.com/account#_=_</code>
  Also see <a href="https://stackoverflow.com/questions/7324944/play-framework-appending-to-redirect-after-facebook-auth-via-oauth2">here</a>. </p>
  
  <p>I want to check in my codebehind whether the <code>#_=_</code> snippet exists, but none of the methods I tried return the right string to run that check on.</p>
  
  <p>All on the <code>Request</code> object I tried:</p>
  
  <ul>
  <li>Rawurl </li>
  <li>URL</li>
  <li>PathAndQuery  </li>
  <li>OriginalString </li>
  <li>AbsoluteUri </li>
  <li>AbsolutePath</li>
  <li>Query </li>
  <li>Fragment</li>
  <li>QueryString</li>
  </ul>
  
  <p>How can I get the right string?</p>