private void LoadAddServiceInDb() { ExtraServiceModel extraService = ListViewServiceSelected; ExtraServiceModel extraServiceConnected = dbOperation.GetAllServicesConnectedForClient(idUser).Where(i => i.name == extraService.name).FirstOrDefault(); if (extraServiceConnected == null) { dbOperation.UpdateBalanceClient(idUser, -extraService.subscFee); dbOperation.AddConnectExtraService(idUser, extraService.id); } }