public void updateGroupMembersTest()
        {
            List <string> add = new List <string> {
                "jmessage"
            };
            List <string> remove = new List <string> {
                "jmessage123"
            };
            MemberPayload   payload = new MemberPayload(add, remove);
            ResponseWrapper content = client.updateGroupMembers(19749893, payload);

            Assert.AreEqual(content.responseCode, HttpStatusCode.BadRequest);
        }
        public static void Main(string[] args)
        {
            GroupClient   client = new GroupClient(app_key, master_secret);
            List <string> add    = new List <string> {
                "jmessage"
            };
            List <string> remove = new List <string> {
                "jmessage123"
            };
            MemberPayload payload = new MemberPayload(add, remove);

            client.updateGroupMembers(19749893, payload);
            Console.ReadLine();
        }