Encrypt in JavaScript and Decrypt in C# With AES Algorithm in ASP.Net MVC

HomeController.cs

 [HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult Index(Login objUL)
        {
            if (ModelState.IsValid)
            {
                var username = AESEncryption.DecryptStringAES(objUL.Username);
                var password = AESEncryption.DecryptStringAES(objUL.Password);

                if (username == "keyError" && password == "keyError")
                {
                    TempData["notice"] = "Invalid  Login";
                }
                else
                {
                    TempData["notice"] = "login successfully";
                }
                return View(objUL);
            }
            else
            {
                ModelState.AddModelError(string.Empty, "Invalid  Login");
                return View(objUL);
            }
        }