public ActionResult LogOn()
        {
            string resultUrl = CasHelper.Login(); //Do the CAS Login

            if (resultUrl != null)
            {
                return(Redirect(resultUrl));
            }

            TempData["URL"] = resultUrl;

            return(View());
        }
 public ActionResult LogOut()
 {
     return(Redirect(CasHelper.Logout()));
 }