unfinished TIMER

/*********THIS IS THE TIME CLASS***********/
using System;
using System.Windows;
using System.Windows.Threading;

namespace CompiledExperience.WP7.Midnight
{
	public partial class MainPage
	{
		private DispatcherTimer timer;

		public MainPage()
		{
			InitializeComponent();

			Loaded += OnLoaded;
		}

		private void OnLoaded(object sender, RoutedEventArgs e)
		{
			timer = new DispatcherTimer
			{
				Interval = TimeSpan.FromSeconds(1)
			};

			timer.Tick += OnTick;

			timer.Start();
		}

		private void OnTick(object sender, EventArgs e)
		{
			var midnight = DateTime.Today.AddHours(24);
			var timeLeft = midnight - DateTime.Now;

			Countdown.Text = String.Format("{0:D2}:{1:D2}:{2:D2}", timeLeft.Hours, 	              timeLeft.Minutes, timeLeft.Seconds);
		}
	}
}

/*************** THIS IS THE APP CLASS ******************/
using System.Diagnostics;
using System.Windows;
using System.Windows.Navigation;
using Microsoft.Phone.Controls;

namespace CompiledExperience.WP7.Midnight
{
	public partial class App
	{
        private bool phoneApplicationInitialized;

		public App()
		{
			UnhandledException += OnUnhandledException;

			InitializeComponent();

			InitializePhoneApplication();
		}

	    public PhoneApplicationFrame RootFrame
	    {
	        get; private set;
	    }

		private static void OnNavigationFailed(object sender, NavigationFailedEventArgs e)
		{
			if(Debugger.IsAttached)
				Debugger.Break();
		}

		private static void OnUnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
		{
			if(Debugger.IsAttached)
				Debugger.Break();
		}


		private void InitializePhoneApplication()
		{
			if(phoneApplicationInitialized)
				return;
			RootFrame = new PhoneApplicationFrame();

			RootFrame.Navigated += CompleteInitializePhoneApplication;
			RootFrame.NavigationFailed += OnNavigationFailed;

			phoneApplicationInitialized = true;
		}

		private void CompleteInitializePhoneApplication(object sender, NavigationEventArgs e)
		{
            RootVisual = RootFrame;

			RootFrame.Navigated -= CompleteInitializePhoneApplication;
		}
	}
}