JsonConvert.DeserializeAnonymousType

 string JsApiTicketString = string.Empty;
                using (StreamReader reader = new StreamReader(response.GetResponseStream()))
                {
                    JsApiTicketString = reader.ReadToEnd();
                    LogWriter.ToTrace(string.Format("获取JSAPITicke 结果：{0}", JsApiTicketString));
                }
                var jsApiTicketObj = new { Code = "", ErrorMessage = "", AppId = "", JsApiTicket = "" };

                var ticketObj = JsonConvert.DeserializeAnonymousType(JsApiTicketString, jsApiTicketObj);
                ticket = ticketObj.JsApiTicket;