public ActionResult Edit(int id, TINHTRANGSACH tINHTRANGSACH)
        {
            try
            {
                db.Entry(tINHTRANGSACH).State = EntityState.Modified;
                db.SaveChanges();

                return(RedirectToAction("Index"));
            }
            catch
            {
                return(View());
            }
        }
        public ActionResult Create(TINHTRANGSACH tINHTRANGSACH)
        {
            try
            {
                db.TINHTRANGSACHes.Add(tINHTRANGSACH);
                db.SaveChanges();

                return(RedirectToAction("Index"));
            }
            catch
            {
                return(View());
            }
        }
        public ActionResult Delete(int id, FormCollection collection)
        {
            try
            {
                TINHTRANGSACH tINHTRANGSACH = db.TINHTRANGSACHes.Where(x => x.MATINHTRANG == id).FirstOrDefault();
                db.TINHTRANGSACHes.Remove(tINHTRANGSACH);
                db.SaveChanges();

                return(RedirectToAction("Index"));
            }
            catch
            {
                return(View());
            }
        }