Raise an event of a class from a different class in C#

Question

I have a class, EventContainer.cs, which contains an event, say:

public event EventHandler AfterSearch;

I have another class, EventRaiser.c

Answer 1

It is POSSIBLE, but using clever hack.

Inspired by http://netpl.blogspot.com/2010/10/is-net-type-safe.html

If you don't believe, try this code.

using System;
using System.Runtime.InteropServices;

namespace Overlapping
{
    [StructLayout(LayoutKind.Explicit)]
    public class OverlapEvents
    {
        [FieldOffset(0)]
        public Foo Source;

        [FieldOffset(0)]
        public OtherFoo Target;
    }

    public class Foo
    {
        public event EventHandler Clicked;

        public override string ToString()
        {
            return "Hello Foo";
        }

        public void Click()
        {
            InvokeClicked(EventArgs.Empty);
        }

        private void InvokeClicked(EventArgs e)
        {
            var handler = Clicked;
            if (handler != null)
                handler(this, e);
        }
    }

    public class OtherFoo
    {
        public event EventHandler Clicked;

        public override string ToString()
        {
            return "Hello OtherFoo";
        }

        public void Click2()
        {
            InvokeClicked(EventArgs.Empty);
        }

        private void InvokeClicked(EventArgs e)
        {
            var handler = Clicked;
            if (handler != null)
                handler(this, e);
        }

        public void Clean()
        {
            Clicked = null;
        }
    }

    class Test
    {
        public static void Test3()
        {
            var a = new Foo();
            a.Clicked += AClicked;
            a.Click();
            var o = new OverlapEvents { Source = a };
            o.Target.Click2();
            o.Target.Clean();

            o.Target.Click2();
            a.Click();
        }

        static void AClicked(object sender, EventArgs e)
        {
            Console.WriteLine(sender.ToString());
        }
    }
}