public ActionResult Login(Authentication login)
 {
     using (AssetManagementEntities entities = new AssetManagementEntities())
     {
         var    authenticate = entities.UserAuthentication(login.username, login.password);
         string data         = authenticate.FirstOrDefault();
         if (data != "User not found !")
         {
             //HttpContext.Session["username"] = data;
             ////HttpContext.Current.Session.Add("__MySessionObject", data);
             Session["username"] = data;
             return(RedirectToAction("Index", "Home"));
             //return Redirect(Request.UrlReferrer.ToString());
         }
         else
         {
             //return RedirectToAction("Index", "Login/Index"); ;
             return(Redirect(Request.UrlReferrer.ToString()));
         }
     }
 }