// GET: Teacher/Details/5 public async Task <ActionResult> Details(int?id) { if (id == null) { return(BadRequest());//standard taalafhankelijk browser Http Error 400 } var education = await _teacherRepo.GetForIdAsync(id.Value); if (education == null) { //return NotFound(); //Http Error 404 //Of: Zorg voor een customised error (zie verder) Response.Redirect("/Error/404"); return(View("Error", new ErrorViewModel { RequestId = HttpContext.TraceIdentifier })); } return(View(education)); }