public bool Add(UserDTO user)
        {
            try
            {
                _dal.BeginTransaction();
                T_User UserEntity = new T_User {
                    Birthday = DateTime.Now, UserName = user.UserName
                };
                _dal.Insert <T_User>(UserEntity, false);

                _dal.CommitTransaction();
            }
            catch
            {
                _dal.RollbackTransaction();
            }
            return(true);
        }