public ActionResult AddQuestion(Question question)
 {
     if (ModelState.IsValid)
     {
         _questionDbContext.dbSet.Add(question);
         _questionDbContext.SaveChanges();
         return RedirectToAction("AddQuestion");
     }
     return View(question);
 }
 public ActionResult Edit(Question question)
 {
     if (ModelState.IsValid)
     {
         _questionDbContext.Entry(question).State = EntityState.Modified;
         _questionDbContext.SaveChanges();
         return RedirectToAction("Index");
     }
     return View(question);
 }