SIPSorcery.SoftPhone.MediaManager.StopLocalVideo C# (CSharp) Метод

        public void StopLocalVideo()
        {
            if (_localVideoSamplingTask != null && !_localVideoSamplingTask.IsCompleted && _localVideoSamplingCancelTokenSource != null)
            {
                _localVideoSamplingCancelTokenSource.Cancel();
            }
        }

 private void StopLocalVideo(object sender, System.Windows.RoutedEventArgs e)
 {
     _mediaManager.StopLocalVideo();
     _startLocalVideoButton.IsEnabled = true;
     _stopLocalVideoButton.IsEnabled  = false;
     _localVideoDevices.IsEnabled     = true;
 }