public ActionResult Create(Session session)
        {
            if (!ModelState.IsValid)
            {
                return View(session);
            }

            try
            {
                ConferenceContext context = new ConferenceContext();
                context.Sessions.Add(session);
                context.SaveChanges();
            }
            catch ( Exception e)
            {
                ModelState.AddModelError("error", e.Message);
                return View(session);
            }

            TempData["Message"] = "Created" + session.Title;
            return RedirectToAction("Index");
        }
 // GET: Session
 public ActionResult Index()
 {
     ConferenceContext Context = new ConferenceContext();
     List<Session> Sessions = Context.Sessions.ToList();
     return View(Session);
 }