title: Sitemap Node URL not accepting Multiple querystring
body: <p>In the sitemap file, I have sitemap Node URL which have more than 1 query string, like...</p>
  
  <pre><code>&lt;siteMapNode url="~/abc.aspx?m=2&amp;c=2" title="title" description="" /&gt;
  </code></pre>
  
  <p>but I am getting error at '&amp;'
  <br/>how to handle multiple query string?</p>