public partial class GamePage : PhoneApplicationPage
    {
        ContentManager contentManager;
        GameTimer timer;
        SpriteBatch spriteBatch;
        Texture2D texture;
        // UIElementRenderer allows us to draw Silverlight UI into a Texture2D, which we can then draw
        // using SpriteBatch to composite UI on top of our game
        UIElementRenderer uiRenderer;
        public GamePage()
        {
            InitializeComponent();

            // Get the content manager from the application
            contentManager = (Application.Current as App).Content;

            // Create a timer for this page
            timer = new GameTimer();
            timer.UpdateInterval = TimeSpan.FromTicks(333333);
            timer.Update += OnUpdate;
            timer.Draw += OnDraw;

            // We use the LayoutUpdated event in order to handle creation of the UIElementRenderer
            LayoutUpdated += new EventHandler(GamePage_LayoutUpdated);

            texture = contentManager.Load<Texture2D>("paddle_blue");


        }