public void Stop()
{
if (_state == RecorderState.Stopped || _state == RecorderState.Unknown)
{
throw new InvalidOperationException("No recording in progress.");
}
if (_capture.StopCapture())
{
_state = RecorderState.Stopped;
_timer.Stop();
_isCapturing = false;
_writer.Flush();
}
_stream.Dispose();
}