mscorlib.ni.dll中的System.UnauthorizedAccessException'

Question

运行我的代码时出现此错误： 抛出异常：mscorlib.ni.dll中的'System.UnauthorizedAccessException' WinRT信息：访问被拒绝

到达此行时会抛出异常： await recog.ContinuousRecognitionSession.StartAsync（）;

namespace yesorno
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
        }

        private async void button_Click(object sender, RoutedEventArgs e)
        {
            Language newlanguage = new Language("en-US");
            SpeechRecognizer recog = new SpeechRecognizer(newlanguage);

            StorageFile mygr = await Package.Current.InstalledLocation.GetFileAsync(@"Grammar\Commands.xml");
            SpeechRecognitionGrammarFileConstraint gc = new SpeechRecognitionGrammarFileConstraint(mygr);
            recog.Constraints.Add(gc);
            SpeechRecognitionCompilationResult cr = await recog.CompileConstraintsAsync();
            Debug.Write(cr.Status);
            if (cr.Status==SpeechRecognitionResultStatus.Success)
            {
                await recog.ContinuousRecognitionSession.StartAsync();
            }
            else
            {

            }
        }

        private void recog_result(SpeechContinuousRecognitionSession sender,SpeechContinuousRecognitionResultGeneratedEventArgs args)
        {

            switch (args.Result.Text)
            {
                case "yes":
                    Debug.Write("yes");
                    break;
                case "no":
                    Debug.Write("no");
                    break;
            }
        }
    }
}

任何帮助将不胜感激。感谢。

在Windows 10和Win10 ioT上尝试过它