title: Prevent XDocument or XElement form Encoding content
body: <p>When I call XDocument.Save it is encoding my html <code>&lt;br/&gt;</code> tag, is there a way to prevent this?</p>
  
  <pre><code>XDocument xDoc = new XDocument(new XElement("desc","jon skeet &lt;br/&gt; knows, the &lt;br/&gt; answer"));
  xDoc.Save(Server.MapPath("~/tempUploads/encodeTest.xml"));
  </code></pre>
  
  <p>OUTPUT IS:    </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;desc&gt;jon skeet &amp;lt;br/&amp;gt; knows, the &amp;lt;br/&amp;gt; answer&lt;/desc&gt;
  </code></pre>
  
  <p>OUTPUT I WOULD LIKE:    </p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;desc&gt;jon skeet &lt;br/&gt; knows, the &lt;br/&gt; answer&lt;/desc&gt;
  </code></pre>