C#

public class EventsManager
{
	public delegate void EventHandler(Object sender);
	public event EventHandler EventsHolder;

        protected virtual void OnEventOccurred()
	{
		if(EventsHolder != null) //meaning there is a listener for the event somewhere
			EventsHolder(this);
	}		

	public void EventWasFired()
	{
		OnEventOccurred();
	}
}

public class driver	
{
	//declare an events manager variable, make it <code>public</code> <code>static</code> so you can query it from all classes in your
	//namespace
	public static EventsManager em;
	
	static void Main() 
	{
	    em = new EventsManager();
	    Application.Run(new Form1());
	}
}

public UserControl1(EventsManager em)
{			
    InitializeComponent();
    em.EventsHolder += new EventsManager.EventHandler(ButtonWasPressed);			
}

private void ButtonWasPressed(Object sender)
{
    this.BackColor = Color.Red;
}

private void button1_Click(object sender, System.EventArgs e)
{
    driver.em.EventWasFired();
}