SpeechRecognizerUI sr = new SpeechRecognizerUI();
sr.Settings.ListenText = "Say the recipient and body of the E-Mail";
sr.Settings.ExampleText = "Mom saying Happy Mother's Day";
//await Speak("Say the recipient and body of the E-Mail"); // TTS prompt
var recoResult = await sr.RecognizeWithUIAsync();
MessageBox.Show(recoResult.RecognitionResult.Text);
这会引发未处理的异常并且 WP8 应用程序崩溃。我该如何解决?