title: The name 'HttpUtility' does not exist in the current context (winform)
body: <p>Iget the following error:</p>
  
  <blockquote>
    <p>The name 'HttpUtility' does not exist in the current context</p>
  </blockquote>
  
  <p>I am building a <code>winform</code> app this my code using <code>framework 4 client profile</code>
  and I can't find the <code>System.Web</code> reference:</p>
  
  <pre><code>string longurl = "https://test.com/currentaccount/Pages/current.aspx";
                          var uriBuilder = new UriBuilder(longurl);
                          var query = HttpUtility.ParseQueryString(uriBuilder.Query);//error
                          query["ltFrom"] = FromDate;
                          query["ltTo"] = ToDate;
                          query["ltFilterSelected"] = "none";
                          uriBuilder.Query = query.ToString();
                          longurl = uriBuilder.ToString();
  </code></pre>
  
  <p>What is the problem?</p>