void SpeechReceived(object sender, SpeechRecognizedEvent e)
 {
     DestText.Text = e.Text;
 }
 protected void OnSpeechRecognized(SpeechRecognizedEvent e)
 {
     SpeechRecognized?.Invoke(this, e);
 }
 private void OnSpeechRecognized(object o, SpeechRecognizedEvent args)
 {
     _taskCompletionSource.SetResult(args.RecognizedText);
     _context.SpeechRecognized -= OnSpeechRecognized;
 }
 /// <summary>
 /// 音声認識完了イベントを発生
 /// </summary>
 /// <param name="e"></param>
 protected virtual void OnSpeechRecognizedEvent(SpeechRecognizedEventArgs e)
 {
     SpeechRecognizedEvent?.Invoke(this, e);
 }