silverlight 鼠标事件处理

 <Ellipse Name="ellipse" Width="120" Height="120" Fill="Orange" 
                     Canvas.Top="60" Canvas.Left="80"/>

 <Ellipse Name="ellipse" Width="120" Height="120" Fill="Orange" 
                     Canvas.Top="60" Canvas.Left="80" MouseEnter="OnMouseEnter"/>

public MainPage()
        {
            InitializeComponent();
          
            ellipse.MouseEnter += new MouseEnterHander(OnMouseEnter);
            ellipse.MouseLeave += new MouseEnterHander(OnMouseEnter);
       }

void OnMouseEnter(object sender, MouseEventArgs e)
     {
        Ellipse m = sender as Ellipse;
        m.Fill=new SolidColorBrush(Color.Green);
     }

 public MainPage()
        {
            InitializeComponent();
           
            ellipse.MouseEnter += Ellipse_MouseEnter;
            ellipse.MouseLeave += Ellipse_MouseLeave;
            
        }

    private void Ellipse_MouseLeave(object sender,MouseEventArgs e)
        {
            Ellipse ell = sender as Ellipse;
            ell.Fill = new SolidColorBrush(Colors.Gray);
        }
    private void Ellipse_MouseEnter(object sender, MouseEventArgs e)
        {
            Ellipse ell = sender as Ellipse;
            ell.Fill = new SolidColorBrush(Colors.Black);
        }