WPF Project cannot find system.web Assembly
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/5208862/how-do-i-add-system-web-as-a-reference-if-i-cant-find-it-in-the-list-of-referenc">How do I add System.Web as a reference if I cant find it in the list of references?</a>  </p>
</blockquote>



<p>I am developing <code>wpf</code> application.</p>

<p>I am using one of the <code>system.web</code> class called <code>HttpUtility</code>.</p>

<p>I am not able to add the reference.</p>

<p>Thank you.</p>
