title: Does .NET 4 have a built-in JSON serializer/deserializer?
body: <p>Does .NET 4 come with any class that serializes/deserializes JSON data?</p>
  
  <ul>
  <li><p>I know there are 3rd-party libraries, such as <a href="http://james.newtonking.com/projects/json-net.aspx" rel="noreferrer">JSON.NET</a>, but I am looking for something built right into .NET.</p></li>
  <li><p>I found <a href="http://msdn.microsoft.com/en-us/library/ms733127.aspx" rel="noreferrer">Data Contracts</a> on MSDN, but it is for WCF, not for Winforms or WPF.</p></li>
  </ul>