BestFriend.MainPage.SpeakAsync C# (CSharp) Метод

        private async Task SpeakAsync(string toSpeak)
        {
            text.Text = "Speaking...";
            SpeechSynthesizer speechSyntesizer = new SpeechSynthesizer();
            SpeechSynthesisStream syntStream = await speechSyntesizer.SynthesizeTextToStreamAsync(toSpeak);
            Media.SetSource(syntStream, syntStream.ContentType);

            Task t = Task.Run(() =>
            {
                manualResetEvent.Reset();
                manualResetEvent.WaitOne();
            });

            await t;
            text.Text = "";
        }