public ActionResult AddAnswerPost(Question formModel, int Answer)
        {
            if (ModelState.IsValid)
            {
                var modelDb = QuestionRepository.Find(formModel.ID);
                var modelAnswer = AnswerRepository.Find(Answer);
                modelDb.Answers.Add(modelAnswer);
                if (this.TryUpdateModel(modelDb))
                {
                    QuestionRepository.Update(modelDb);
                    QuestionRepository.Save();

                    //return RedirectToAction("Index");
                }

            }
            FillDropdownValues();
            return View(formModel);
        }
        public ActionResult Create(Question model)
        {
            if(ModelState.IsValid)
            {
                QuestionRepository.Insert(model);
                QuestionRepository.Save();
                //return RedirectToAction("Index");
            }

            FillDropdownValues();
            return View(model);
        }
        public ActionResult EditPost(Question formModel)
        {
            if (ModelState.IsValid)
            {
                var modelDb = QuestionRepository.Find(formModel.ID);

                if(this.TryUpdateModel(modelDb))
                {
                    QuestionRepository.Update(modelDb);
                    QuestionRepository.Save();

                    return RedirectToAction("Index");
                }
            }

            FillDropdownValues();
            return View(formModel);
        }