public ActionResult Index(int id)
        {
            var model = new WizardViewModel
            {
                Id = id,
                Question = "Question: " + id
            };

            return View(model);
        }
        public ActionResult Index(WizardViewModel model)
        {
            if (ModelState.IsValid)
            {
                if (model.Id++ == 25)
                    return RedirectToAction("Finished");

                return RedirectToAction("Index", new { model.Id });
            }

            return View(model);
        }