C#

DrunkenSailor sailor = new DrunkenSailor();<br />
sailor.HellRaised += new EventHandler(sailor_HellRaised);<br />
sailor.RaiseHell(); //event fires<br />
sailor = new DrunkenSailor();<br />
sailor.RaiseHell(); //event does not fire.  No handler has been assigned to this instance.

using System;
using System.Windows.Forms;

class MyForm : Form
{
Button b1;
public MyForm()
{
b1 = new Button();
b1.Dock = DockStyle.Fill;
Controls.Add(b1);
b1.Click += new System.EventHandler(button_click);
}
void button_click(object sender, EventArgs e)
{
Console.WriteLine("Button was Clicked");
}

static void Main()
{
Application.Run(new MyForm());
}
}

using System;
using System.Windows.Forms;
public class MyForm : Form{
  protected Button button1;

  public MyForm(){
    button1 = new Button;
    // set button1 properties i.e. Text, Location, Size, etc.
    button1.Click += new EventHandler(button1_Click);
    this.Controls.Add(button1);
  }

  private void button1_Click(object sender, EventArgs e){
    MessageBox.Show("Button Clicked!");
  }

  public static void Main(){
    Application.Run(new MyForm());
  }
}