C# Delegates

delegate.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WinFormsDelegateTest
{
    public partial class Form1 : Form
    {
        // delegate for button event handler
        public delegate void ButtonClickEventHandler(object sender, EventArgs e);

        public Form1()
        {
            InitializeComponent();

            // instantiate handlers
            ButtonClickEventHandler firstHandler = new ButtonClickEventHandler(button1_FirstClickHandler);
            ButtonClickEventHandler secondHandler = new ButtonClickEventHandler(button1_SecondClickHandler);

            // assign handlers
            button1.Click += new System.EventHandler(firstHandler);
            button1.Click += new System.EventHandler(secondHandler);
            
            // Now button click triggers both events and shows two message boxes
        }

        private void button1_FirstClickHandler(object sender, EventArgs e)
        {
            MessageBox.Show("Tere!");
        }

        private void button1_SecondClickHandler(object sender, EventArgs e)
        {
            MessageBox.Show("Moro!");
        }
    }
}