title: How to stream an XElement/XDocument with WCF?
body: <p>I have the following method signature. I cannot change it (i.e. I cannot change the return type).</p>
  
  <pre><code>public Stream GetMusicInfo(string songId)
  {
      XElement data = dao.GetMusicInfo(songId);
  
      // how do I stream the XElement?
  }
  </code></pre>
  
  <p>How can I stream the XElement/XDocument with WCF? </p>