如何从Web服务返回JSON

用：

[WebMethod][scriptMethod(ResponseFormat = ResponseFormat.Json)]//Specify return format.public string CheckFeedSubmission()    {        string responseText = "";        try        { //Stuff goes here responseText = "It Worked!"        }        catch (Exception ex) { responseText = "Opps wehave an error! Exception message:" + ex.Message; }        return responseText ;    }

返回的结果将类似于：

<string xmlns="http://tempuri.org/"/> {"success" : true, "message" : "***Message Here***"}</string>