//朗读选中文本
private async void OnRead(string text)
{
if (text != "")
{
SpeechSynthesizer synthesizer = new SpeechSynthesizer();
SpeechSynthesisStream stream = await synthesizer.SynthesizeTextToStreamAsync(text);
//Me为MediaElement AutoPlay true；
PronunciationPlayer.SetSource(stream, stream.ContentType);
}
}
