public void DeleteUserAuthentications(User user, DeviceController device) { if (user == null || device == null) { return; } if (user.UserAuthentications == null || user.UserAuthentications.Count == 0) { return; } Log.Info("Getting user authentication infos..."); var userAuthenticationsOfDevice = user.UserAuthentications.Where(a => a.DeviceID == device.DeviceID); var authenticationsOfDevice = userAuthenticationsOfDevice as IList <UserAuthentication> ?? userAuthenticationsOfDevice.ToList(); Log.InfoFormat("Deleting user authentication, UserId={0}, DeviceId={1}.", user.UserID, device.DeviceID); authenticationsOfDevice.ForEach(x => { _userAuthenticationRepo.Delete(x.UserAuthenticationID); Log.InfoFormat("User authentication id={0} deleted", x.UserAuthenticationID); }); _userEventRepo.Insert(new UserEvent() { EventType = UserEventType.Modify, UserID = user.UserID, CreateDate = DateTime.Now, CreateUserID = GlobalSetting.DeviceSystemId, IsFinished = true, EventData = "Delete user authentications by sync system user operation", }); }