public ActionResult Login()
        {
            return View();
        }
        [HttpPost]
        public ActionResult Login(Panel model, string Username, string Password)
        {
            if (ModelState.IsValid)
            {
                if (model.Username == Username && model.Password == Password)
                {
                    FormsAuthentication.SetAuthCookie(model.Username, false);
                    return RedirectToAction("Index", "Test");
                }
                else
                {
                    ModelState.AddModelError("", "Wrong username or password");
                }
            }
            return View();
        }

        [Authorize]
        public ActionResult Index()

        {

            return View();
        }

if (model.Username == Username && model.Password == Password)

[HttpPost]
public ActionResult Login(Panel model)
{
    if (ModelState.IsValid)
    {
        if (Membership.ValidateUser(model.Username, model.Password))
        {
            FormsAuthentication.SetAuthCookie(model.Username, false);
            return RedirectToAction("Index", "Test");
        }
        else
        {
            ModelState.AddModelError("", "Wrong username or password");
        }
    }
    return View();
}