title: How to add an existing Xml string into a XElement
body: <p>How to add an existing Xml string into a XElement?</p>
  
  <p>This code</p>
  
  <pre><code>        var doc = new XDocument(
              new XElement("results", "&lt;result&gt;...&lt;/result&gt;")
          );
  </code></pre>
  
  <p>of course produces this</p>
  
  <pre><code>  &lt;results&gt;&amp;lt;result&amp;gt;&amp;lt;/result&amp;gt;&lt;/results&gt;
  </code></pre>
  
  <p>but I need this </p>
  
  <pre><code>  &lt;results&gt;&lt;result&gt;...&lt;/result&gt;&lt;/results&gt;
  </code></pre>
  
  <p>Any ideas?</p>