Stopping Text to Speech wp8

Question

I am developing a WP8 application and Text to Speech is used heavily in it, In the app when you click on a button to go to a new page it tells which button you have pressed, but I want the text to speech to stop as soon as it changes page, Is there a way of stopping the text to speech as soon as a new page appears, even if the text to speech is only half way through what it has to say. here is a small piece of code from my application so I want to cut off the voice as soon as it goes to the instructions page, any help you be much appreciated. Thanks

  private async void SayWords(string words)
    {
        SpeechSynthesizer synth = new SpeechSynthesizer();

         await synth.SpeakTextAsync(words);

    }

private void Instructions_Click(object sender, RoutedEventArgs e)
    {
        checkSender(sender); 
            TapCount++;
        if (TapCount == 2)
        {
              NavigationService.Navigate(new Uri("/instructions.xaml", UriKind.Relative));

        }

        else
        {
            SayWords("You have selected the Instructions");

        }

    }

Answer 1

Use the CancelAll method.

private SpeechSynthesizer synth = new SpeechSynthesizer();

private async void Button_Click(object sender, RoutedEventArgs e) 
{
    await synth.SpeakTextAsync("You have an incoming notification from Big Bank.");
}

private void Button_Click_1(object sender, RoutedEventArgs e) 
{
       synth.CancelAll();
}