public bool Add(string serverName, string description, string url, bool isActive, string cityID) { Guid gCityID = new Guid(cityID); var city = CityRepository.GetQueryable().Single(c => c.CityID == gCityID); var server = new THOK.Authority.DbModel.Server() { ServerID = Guid.NewGuid(), ServerName = serverName, Description = description, Url = url, IsActive = isActive, City = city }; ServerRepository.Add(server); ServerRepository.SaveChanges(); return(true); }