public ActionResult Create(UserVM vm)
        {
            try
            {
                var id = vms.OrderByDescending(i => i.Id).Select(i => i.Id).FirstOrDefault();
                vm.Id = ++id;
                vms.Add(vm);

                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }
        public ActionResult Edit(int id, UserVM vm)
        {
            try
            {
                var locSource = vms.Where(i => i.Id == id).SingleOrDefault();
                locSource.Username = vm.Username;
                locSource.RelationshipStatus = vm.RelationshipStatus;
                locSource.SubscriptionEmail = vm.SubscriptionEmail;
                locSource.SubscriptionSMS = vm.SubscriptionSMS;
                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }

        }