public void InsertOrUpdate(Movie movie)
 {
     if (movie.MovieId == default(int)) {
         // New entity
         context.Movies.Add(movie);
     } else {
         // Existing entity
         context.Entry(movie).State = EntityState.Modified;
     }
 }
 public ActionResult Create(Movie movie)
 {
     if (ModelState.IsValid)
     {
         _movieRepository.InsertOrUpdate(movie);
         _movieRepository.Save();
         return RedirectToAction("Index");
     }
     ViewBag.PossibleGenres = _genreRepository.All;
     return View();
 }