C#EventManager_EventManager_2b

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace EventManager2b
{
    class EventManager
    {
        public delegate void MyEventHandler(object sender, EventArgs e);

        private Dictionary<string, Dummy> listeners = new Dictionary<string, Dummy>();

        public void AttachListener(string myEvent, MyEventHandler handler)
        {
            Dummy dummy;
            if (listeners.ContainsKey(myEvent))
            {
                dummy = listeners[myEvent];
                dummy.handlers += handler;
            }
            else
            {
                dummy = new Dummy();
                dummy.handlers += handler;
                listeners.Add(myEvent, dummy);
            }
        }

        public void TriggerEvent(string myEvent, object sender, EventArgs e)
        {
            if(listeners.ContainsKey(myEvent))
            {
                Dummy dummy = listeners[myEvent];
                dummy.OnEvent(sender, e);
            }
        }

        public class Dummy
        {
            public event MyEventHandler handlers;

            public void OnEvent(object sender, EventArgs e)
            {
                if (handlers != null)
                {
                    handlers(sender, e);
                }
            }
        }

    }
}