public ActionResult Edit(AddEditConferenceUserViewModel conferenceUser)
        {
            var user = new ConferenceUser()
            {
                Id             = conferenceUser.Id,
                Name           = conferenceUser.Name,
                LastName       = conferenceUser.LastName,
                Email          = conferenceUser.Email,
                Password       = conferenceUser.Password,
                ConferenceType = conferenceUser.ConferenceType,
                City           = _conferenceUser.GetCity(conferenceUser.CityId)
            };

            _conferenceUser.Edit(user);
            return(RedirectToAction("Index"));
        }
        // GET: ConferenceUser/Edit/5
        public ActionResult Edit(Guid id)
        {
            ConferenceUser conferenceUser = _conferenceUser.GetById(id);
            var            vm             = new AddEditConferenceUserViewModel()
            {
                Id             = id,
                Name           = conferenceUser.Name,
                LastName       = conferenceUser.LastName,
                Email          = conferenceUser.Email,
                Password       = conferenceUser.Password,
                ConferenceType = conferenceUser.ConferenceType,
                CityId         = conferenceUser.City.Id.ToString()
            };

            return(View(vm));
        }