gistfile1.cs

        public ActionResult Index()
        {
            return View();
        }

        [HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult Index(LoginModel login)
        {
            if (ModelState.IsValid)
            {                
                var aluno = _alunoDal.RealizaLogin(login.Email, login.Senha);

                if (aluno == null)
                {
                    ModelState.AddModelError("Email", "Email ou senha inválidos");
                    return View();
                }

                FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(1, login.Email, DateTime.Now, DateTime.Now.AddMinutes(50), false, aluno.Nome, FormsAuthentication.FormsCookiePath);
                string hashCookies = FormsAuthentication.Encrypt(ticket);
                HttpCookie cookie = new HttpCookie(FormsAuthentication.FormsCookieName, hashCookies);

                Response.Cookies.Add(cookie);

                LoggedUser user = new LoggedUser();
                user.Nome = aluno.Nome;
                user.Email = login.Email;
                user.IdAluno = aluno.IdAluno;

                Session["userdata"] = user;

                return RedirectToAction("Index", "AreaAluno");
            }

            return View(login);
        }