public static void Put(string format)
        {
            var id = GetSelectedId();

            if (id != Guid.Empty)
            {
                var c = new RestSharp.RestClient(String.Format("{0}", baseUrl));
                var model = Models.First(user => user.Id == id);
                model.Name = "RestClient user updated";

                c.PutAsync<UserModel>(CreateRequest(Method.PUT, "json").AddBody(model),
                                      (resp, result) => WriteResult("PUT", resp));
            }
        }