title: How to pass TimeSpan value in JSON format?
body: <p>I use Fiddler to test my WCF Rest. I always get  </p>
  
  <pre><code>HTTP/1.1 400 Bad Request  
  </code></pre>
  
  <p>with this post value:  </p>
  
  <pre><code>{
      "session":{
          "Session":"088a688d-ea69-4264-9266-381e9e540d00",
          "LoginID":"testid",
          "Serial":"testserial"
      },
      "sub":[
          {
              "Type":0,
              "StartDate":"\/Date(1319731200000+0800)\/",
              "EndDate":"\/Date(1319731200000+0800)\/",
              "Duration":"12:12:12"
          }
      ]
  }  
  </code></pre>
  
  <p>I get the error in 'Duration' value. I've been searching on net but no luck at all.<br>
  I hope I'll find the answer here. Thanks a lot! </p>