public ActionResult Login(string email = "", string password = "")
 {
     if (Request.HttpMethod == "GET")
     {
         return(View());
     }
     else
     {
         var newUser = AccountBLL.Account_Login(email, password);
         if (newUser != null)
         {
             Account account = AccountBLL.Account_Login(email, password);
             FormsAuthentication.SetAuthCookie(account.AccountID.ToString(), false);
             HttpCookie userInfo = new HttpCookie("userInfo");
             userInfo["AccountID"] = account.AccountID.ToString();
             userInfo["FullName"]  = Server.UrlEncode(account.LastName + " " + account.FirstName);
             userInfo["Email"]     = account.Email;
             userInfo["PhotoPath"] = account.PhotoPath;
             userInfo.Expires      = DateTime.Now.AddDays(1);
             Response.Cookies.Add(userInfo);
             return(RedirectToAction("Index", "Dashboard"));
         }
         else
         {
             ModelState.AddModelError("error", "Đăng nhập thất bại");
             ViewBag.email = email;
             return(View());
         }
     }
 }