using System; public class AddandRemoveFunctions2 { static public void ButtonHandler(object sender, EventArgs e) { Console.WriteLine("Button clicked"); } public static void Main() { Button button = new Button(); button.Click += new Button.ClickHandler(ButtonHandler); button.SimulateClick(); button.Click -= new Button.ClickHandler(ButtonHandler); } } public class Button { public delegate void ClickHandler(object sender, EventArgs e); public event ClickHandler Click; protected void OnClick() { if (Click != null) Click(this, null); } public void SimulateClick() { OnClick(); } }