ContosoUniversity.Controllers.StudentController.EditPost C# (CSharp) Method

        public ActionResult EditPost(int? id)
        {
            if (id == null)
            {
                return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
            }
            var studentToUpdate = db.Students.Find(id);
            if (TryUpdateModel(studentToUpdate, "",
               new string[] { "LastName", "FirstMidName", "EnrollmentDate" }))
            {
                try
                {
                    db.SaveChanges();

                    return RedirectToAction("Index");
                }
                catch (RetryLimitExceededException /* dex */)
                {
                    //Log the error (uncomment dex variable name and add a line here to write a log.
                    ModelState.AddModelError("", "Unable to save changes. Try again, and if the problem persists, see your system administrator.");
                }
            }
            return View(studentToUpdate);
        }