title: Httputility.urldecode replacement in .Net4?
body: <p>I got an <em><code>old Program(class library)</code></em> developed by <em><code>.Net 2</code></em>. Recently I want to use that Program in new project which is use <em><code>.Net4(For new WPF feature's )</code></em>. so there is a big problem:</p>
  
  <blockquote>
    <p>.Net4 don't support <strong>System.Web</strong> and as result it can't be use <strong>Httputility.urldecode</strong>!!</p>
  </blockquote>
  
  <p>So what is <strong><code>urldecode</code></strong> jop? and how can I change that to something, which is support by <em><code>.Net4</code></em>?</p>