public ActionResult Create()
        {
            var viewModel = new SessionsFormViewModel
            {
                Profession = _context.Occupations.ToList()
            };

            return(View(viewModel));
        }
        public ActionResult Create(SessionsFormViewModel viewModel)
        {
            if (!ModelState.IsValid)//applied the not operator
            {
                viewModel.Profession = _context.Occupations.ToList();
                return(View("Create", viewModel));
            }


            var sessions = new Sessions
            {
                MentorId      = User.Identity.GetUserId(),
                DateTime      = viewModel.GetDateTime(),
                OccupationsId = viewModel.Occupations,
                Venue         = viewModel.Venue
            };

            _context.Sessions.Add(sessions);
            _context.SaveChanges();

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