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  4. Use Ellipse AddHandler to add handler to Ellipse objects
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="AddHandler" Height="300" Width="300">
    
        
    

//File:Window.xaml.cs
using System;
using System.Windows;
using System.Diagnostics;
using System.Windows.Shapes;
using System.Windows.Input;
namespace WpfApplication1
{
    public partial class Window1 : System.Windows.Window
    {
        public Window1()
        {
            InitializeComponent();
            myEllipse.AddHandler(Ellipse.MouseDownEvent,new MouseButtonEventHandler(MouseDownEllipse));
            myEllipse.AddHandler(Ellipse.PreviewMouseDownEvent,new MouseButtonEventHandler(PreviewMouseDownEllipse));
        }
       
        void PreviewMouseDownEllipse(object sender, RoutedEventArgs e){ 
            Debug.WriteLine("PreviewMouseDownEllipse"); 
        }
        void MouseDownEllipse(object sender, RoutedEventArgs e){ 
            Debug.WriteLine("MouseDownEllipse"); 
        }
    }
}