title: Open an HTML Document with xml.Load
body: <p>I'd like to open an HTML document (as a string retrieved from a StreamReader, from the web), 
  by creating a XMLDocument this way:</p>
  
  <pre><code>XmlDocument doc = new XmlDocument
  
  doc.Load(string containing the retrieved document).
  </code></pre>
  
  <p>But since the HTML doc contains this head:</p>
  
  <pre><code> &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" &gt; 
  </code></pre>
  
  <p>It tells me that the document is invalid... Any way to workaround this?</p>