[HttpPost, ValidateAntiForgeryToken]
        public ActionResult Update(IList<UserContactUpdate> values, UserContactAction value)
        {
            if (values == null)
            {
                throw new ArgumentNullException("values");
            }

            var identifiers = values.Where(x => x.Selected).Select(x => x.Id).ToList();
            var contacts = this.UserContactService.GetAll(new UserContactIdentifiersSpecification(identifiers));
            var privilege = new UserContactPrivilege();

            if (contacts.Any(contact => !privilege.CanUpdate(contact)))
            {
                return NotAuthorized();
            }

            foreach (var contact in contacts)
            {
                if (value == UserContactAction.Delete)
                {
                    this.UserContactService.Delete(contact);
                }
                else
                {
                    this.UserContactService.Update(contact, value);
                }
            }

            return RedirectToRoute(UsersRoutes.ContactIndex, new { mode = "default" });
        }