I use this code:

JsonTextParser pars = new JsonTextParser();
JsonObject obj = pars.Parse(XXX);

{
"responseData": 
	{
	"results":[],"cursor":
			{
			"moreResultsUrl":"http://www.google.com/search?oe\u003dutf8\u0026ie\u003dutf8\u0026source\u003duds\u0026start\u003d0\u0026hl\u003den\u0026q\u003d%D7%90%D7%97%D7%9C%D7%94+%D7%91%D7%97%D7%9C%D7%94+%D7%91%D7%92%D7%A8%D7%A0%D7%93+%D7%A7%D7%99%D7%99%D7%9E%D7%9F"
			}
	}, 
"responseDetails": null, "responseStatus": 200
}

    System.FormatException was unhandled by user code
      Message="Cannot parse a value."
      Source="System.Net.Json"
      StackTrace:
           at System.Net.Json.JsonTextParser.ParseSomethingWithoutName()
           at System.Net.Json.JsonTextParser.ParseCollection()
           at System.Net.Json.JsonTextParser.ParseSomethingWithoutName()
           at System.Net.Json.JsonTextParser.ParseCollection()
           at System.Net.Json.JsonTextParser.ParseSomethingWithoutName()
           at System.Net.Json.JsonTextParser.ParseCollection()
           at System.Net.Json.JsonTextParser.ParseSomethingWithoutName()
           at System.Net.Json.JsonTextParser.Parse(String text)
           at Default8.Page_Load(Object sender, EventArgs e) in c:\Documents and Settings\eViL\My Documents\Visual Studio 2008\WebSites\NewTest\Default8.aspx.cs:line 20
           at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e)
           at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e)
           at System.Web.UI.Control.OnLoad(EventArgs e)
           at System.Web.UI.Control.LoadRecursive()
           at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
      InnerException:

I'm no expert in json but its seems like a valid json format. And I maybe think its that null, but then it would throw different exception, right?

If I had to guess, I would bet the empty "results" array literal is the problem.

How can I verify and solved that?