public ActionResult Index(Leerling leerling) { if (leerling == null || leerling.Graad == null) { return(RedirectToAction("Index", "Home")); } KlimatogramKiezenIndexViewModel kIVM; switch (leerling.Graad.Nummer) { case 1: case 2: { kIVM = new KlimatogramKiezenIndexViewModel(leerling.GeefContinenten().ToList()); break; } default: return(RedirectToAction("Index", "LocatieOefening")); } return(View(kIVM)); }