title: NameValueCollection to URL Query?
body: <p>I know i can do this</p>
  
  <pre><code>var nv = HttpUtility.ParseQueryString(req.RawUrl);
  </code></pre>
  
  <p>But is there a way to convert this back to a url?</p>
  
  <pre><code>var newUrl = HttpUtility.Something("/page", nv);
  </code></pre>