public ActionResult PostGetRedirect(PostGetRedirectModel model)
        {
            if (ModelState.IsValid)
            {
                // process request...

                TempData.Add("PostGetRedirectModel", model);

                return RedirectToAction("PostGetRedirectSuccess");  // do redirect here to avoid potential resubmission
            }

            return View(model);
        }
        public ActionResult PostGetRedirect()
        {
            var model = new PostGetRedirectModel();

            return View(model);
        }