激光推送V3 的API调用问题 (post json)

HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(url);
            myRequest.Method = "POST";//极光http请求方式为post
            myRequest.Headers.Add("Authorization: " + common.StringHelper.EncodeBase64(ApiKey + ":" + APIMasterSecret));
            myRequest.ContentType = "application/json; charset=utf-8";//按照极光的要求
            myRequest.Accept = "application/json";
            myRequest.ContentLength = data.Length;
            
            Stream newStream = myRequest.GetRequestStream();
            // Send the data.
            newStream.Write(data, 0, data.Length);
            newStream.Close();
            // Get response
            var response = (HttpWebResponse)myRequest.GetResponse();
            using (var reader = new StreamReader(response.GetResponseStream(), Encoding.GetEncoding("UTF-8")))
            {
                string result = reader.ReadToEnd();
                reader.Close();
                response.Close();
                return result;
            }

按照极光推送的要求,拼好了header 但是提交老是400错误(参数错误)…然后本人用文档里的json数据来提交,心想这下不会是参数错了吧,结果还是400,那本人就怀疑是不是本人的post方法有问题啊…发上来让大家帮看看…假如有朋友做过的,请支援一下….谢谢