// Declare the delegate type:
public delegate void CustomEventHandler(object sender, System.EventArgs e);

// Declare the event variable using the delegate type:
public event CustomEventHandler CustomEvent;

public class EventClass
{
    // Declare the delegate type:
    public delegate void CustomEventHandler(object sender, System.EventArgs e);

    // Declare the event variable using the delegate type:
    public event CustomEventHandler CustomEvent;

    public void InvokeEvent()
    {
        // Invoke the event from within the class that declared the event:
        CustomEvent(this, System.EventArgs.Empty);
    }
}

class TestEvents
{
    private static void CodeToRun(object sender, System.EventArgs e)
    {
        System.Console.WriteLine("CodeToRun is executing");
    }

    private static void MoreCodeToRun(object sender, System.EventArgs e)
    {
        System.Console.WriteLine("MoreCodeToRun is executing");
    }

    static void Main()
    {
        EventClass ec = new EventClass();

        ec.CustomEvent += new EventClass.CustomEventHandler(CodeToRun);
        ec.CustomEvent += new EventClass.CustomEventHandler(MoreCodeToRun); 

        System.Console.WriteLine("First Invocation:");
        ec.InvokeEvent();

        ec.CustomEvent -= new EventClass.CustomEventHandler(MoreCodeToRun);

        System.Console.WriteLine("\nSecond Invocation:");
        ec.InvokeEvent();
    }
}