private void SubscribeToPushwoosh(string appID)
        {
            if (_registrationService == null)
                _registrationService = new RegistrationService();

            _registrationService.Register(appID, _notificationChannel.ChannelUri.ToString());
        }
        private void SubscribeToService(string appID)
        {
            if (_registrationService == null)
                _registrationService = new RegistrationService();

            _registrationService.Register(appID, _notificationChannel.Uri);
        }
        private void SubscribeToPushwoosh(string appID)
        {
            if (_registrationService == null)
            {
                _registrationService = new RegistrationService();

                _registrationService.SuccessefulyRegistered += SendTokenToPushwooshSuccess;
                _registrationService.RegisterError += SendTokenToPushwooshFailed;
            }

            _registrationService.Register(appID, _notificationChannel.Uri);
        }