public ActionResult Create(Roles roles)
        {
            if (ModelState.IsValid)
            {
                roles.RoleId = Guid.NewGuid();
                db.Roles.Add(roles);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            return View(roles);
        }
 public ActionResult Edit(Roles roles)
 {
     if (ModelState.IsValid)
     {
         db.Entry(roles).State = EntityState.Modified;
         db.SaveChanges();
         return RedirectToAction("Index");
     }
     return View(roles);
 }