public ActionResult Edit(Contact contact)
        {
            Contact update = null;
            int status = 0;
            using (var db = new SBSVEntities())
            {
                db.ContextOptions.LazyLoadingEnabled = false;

                update = (from c in db.Contacts
                          where c.ContactId == contact.ContactId
                          select c).FirstOrDefault();
            }
            if (update != null)
            {
                update = contact;
                using (var db = new SBSVEntities())
                {
                    db.Contacts.Attach(update);
                    db.ObjectStateManager.ChangeObjectState(update, System.Data.EntityState.Modified);
                    status = db.SaveChanges();
                }

            }

            if (status == 1)
            {
                ViewBag.Message = "data saved";
                return View(contact);
            }
            else
                return View(contact);
        }