public ActionResult Index(int?id)
        {
            if (id == null)
            {
                return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
            }

            QuizResult result = _quizResultService.Get(id.Value);

            if (result != null)
            {
                var vm = _modelConverter.ToQuizReviewViewModel(result);
                return(View("Index", vm));
            }

            return(new HttpStatusCodeResult(HttpStatusCode.NotFound));
        }