public ActionResult Add()
 {
     AddMovieVM model = new AddMovieVM();
     var allGenres = GenreManager.GetAll();
     var checkBoxListItems = new List<CheckBoxListItem>();
     foreach (var genre in allGenres)
     {
         checkBoxListItems.Add(new CheckBoxListItem()
         {
             ID = genre.ID,
             Display = genre.Name,
             IsChecked = false
         });
     }
     model.Genres = checkBoxListItems;
     return View(model);
 }
 public ActionResult Add(AddMovieVM model)
 {
     var selectedGenres = model.Genres.Where(x => x.IsChecked).Select(x => x.ID).ToList();
     MovieManager.Add(model.Title, model.ReleaseDate, model.RunningTimeMinutes, selectedGenres);
     return RedirectToAction("Index");
 }