WindowsFormsApplication1.Form1.addMember C# (CSharp) Метод

        private Tuple<List<String>, List<string>, string> addMember(string room_name, List<string> user_names)
        {
            var url = base_url + String.Format("webwxupdatechatroom?fun=addmember&pass_ticket={0}", pass_ticket);
            var http = WebRequest.Create(url) as HttpWebRequest;
            http.CookieContainer = cookieContainer;
            http.ContentType = "application/json; charset=UTF-8";
            http.Method = "POST";
            var serializer = new JavaScriptSerializer();
            var base_req_param = new { Uin = Int64.Parse(wxuin), Sid = wxsid, Skey = skey, DeviceID = deviceId };
            var payload = serializer.Serialize(new
            {
                BaseRequest = base_req_param,
                ChatRoomName = room_name,
                AddMemberList = unpack(",", user_names)
            });
            Console.WriteLine(payload);
            var response = getPostResponse(http, payload);
            var dic = deserilizeJson(response);           
            var member_list = new List<Dictionary<string, dynamic>>(dic["MemberList"].
                                                           ToArray(typeof(Dictionary<string, dynamic>)));
            var deleted_list = new List<string>();
            var blocked_list = new List<string>();
            member_list.ForEach(member =>
            {
                if ((int) member["MemberStatus"] == 4)
                {
                    deleted_list.Add(member["UserName"]);
                }
                else if ((int) member["MemberStatus"] == 3)
                {
                    blocked_list.Add(member["UserName"]);
                }
            });         
            return Tuple.Create(deleted_list, blocked_list, dic["BaseResponse"]["ErrMsg"]);
        }