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

The raising class has to get a fresh copy of the EventHandler. One possible solution below.

using System;

namespace ConsoleApplication1
{
    class Program
    {
        class HasEvent
        {
            public event EventHandler OnEnvent;
            EventInvoker myInvoker;

            public HasEvent()
            {
                myInvoker = new EventInvoker(this, () => OnEnvent);
            }

            public void MyInvokerRaising() {
                myInvoker.Raise();
            }

        }

        class EventInvoker
        {
            private Func GetEventHandler;
            private object sender;

            public EventInvoker(object sender, Func GetEventHandler)
            {
                this.sender = sender;
                this.GetEventHandler = GetEventHandler;
            }

            public void Raise()
            {
                if(null != GetEventHandler())
                {
                    GetEventHandler()(sender, new EventArgs());
                }
            }
        }

        static void Main(string[] args)
        {
            HasEvent h = new HasEvent();
            h.OnEnvent += H_OnEnvent;
            h.MyInvokerRaising();
        }

        private static void H_OnEnvent(object sender, EventArgs e)
        {
            Console.WriteLine("FIRED");
        }
    }
}