gistfile1.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Navigation;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;
using System.ComponentModel;
using System.Windows.Data;
using Windows.Phone.Speech.Synthesis;
using System.Threading;
using System.Threading.Tasks;

namespace PhoneApp2
{
    public partial class MainPage : PhoneApplicationPage
    {
        private SpeechSynthesizer synthesizer;
        CancellationTokenSource cts = null;
        List<String> text;
        int count = 0;
        // Constructor
        public MainPage()
        {
            InitializeComponent();
            // Sample code to localize the ApplicationBar
            //BuildLocalizedApplicationBar();
            synthesizer = new SpeechSynthesizer();
            text = new List<string>() { "hello", "jaydeep", "I'm", "sirri", "I'm", "here", "to", "help", "you", "hello", "jaydeep", "I'm", "sirri", "I'm", "here", "to", "help", "you" };
        }

        private async void ScreenTap(object sender, System.Windows.Input.GestureEventArgs e)
        {
            if (cts == null)
            {
                cts = new CancellationTokenSource();
                try
                {
                    ReadText(cts.Token);
                }
                catch (OperationCanceledException)
                {
                }
            }
            else
            {
                cts.Cancel();
                cts = null;
            }
        }

        private async Task ReadText(CancellationToken token)
        {
            for (; count < text.Count; count++)
            {
                token.ThrowIfCancellationRequested();
                await synthesizer.SpeakTextAsync(text[count]);
            }
        }

       
    }
}