BAL.Manager.UserManager.IfUserNameExists C# (CSharp) Метод

        public bool IfUserNameExists(string userName)
        {
            var item = uOW.UserRepo.Get().Where(s => (s.UserName.ToUpper() == userName.ToUpper())).FirstOrDefault();
            if (item != null)
            {
                return true;
            }
            return false;
        }