c#.NET微信自定义菜单

  private void customMenu()
         {

             //获取access_token
             string access_token = GetAccessToken();
             StringBuilder sb = new StringBuilder();
             sb.Append("{\"button\":[{\"type\":\"click\",\"name\":\"今日歌曲\",\"key\":\"V1001_TODAY_MUSIC\"},{\"name\":\"菜单\",\"sub_button\":[{\"type\":\"view\",\"name\":\"搜索\",\"url\":\"http://www.soso.com/\"},{\"type\":\"view\",\"name\":\"视频\",\"url\":\"http://v.qq.com/\"},{\"type\":\"click\",\"name\":\"赞一下我们\",\"key\":\"V1001_GOOD\"}]}]}");
             HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://api.weixin.qq.com/cgi-bin/menu/create?access_token=" + access_token);
             byte[] requestBytes = Encoding.UTF8.GetBytes(sb.ToString());
             request.Method = "POST";
             request.ContentType = "application/x-www-form-urlencoded";
             request.ContentLength = requestBytes.Length;
             Stream requestStream = request.GetRequestStream();
             requestStream.Write(requestBytes, , requestBytes.Length);
             requestStream.Close();
             HttpWebResponse response = (HttpWebResponse)request.GetResponse();
             StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.Default);
             string backstr = sr.ReadToEnd();
             sr.Close();
             response.Close();
         }

         private static string GetAccessToken()
         {
             WebClient webClient = new WebClient();
             Byte[] bytes = webClient.DownloadData("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=wx44bc0f54a52d905d&secret=2328cba30d97f8ec3e613f7764a604a9");
             string token = Encoding.UTF8.GetString(bytes);
             string[] result = token.Split(',');
             string access_token1 = result[].Split(':')[];
             string access_token=  access_token1.Substring(,access_token1.Length-);
             return access_token;
         }