C# Delegates example

Program.cs

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

namespace ConsoleApp
{

    public delegate void OnCloseEventHandler(Modal modal);

    public class Modal {
        public string Title { get; set; }

        protected List<OnCloseEventHandler> handlers = new List<OnCloseEventHandler>();

        public void addOnCloseEventListener(OnCloseEventHandler handler) {
            this.handlers.Add(handler);
        }

        public void removeOnCloseEventListener(OnCloseEventHandler handler)
        {
            this.handlers.Remove(handler);
        }

        public void Close() {
            foreach (var handler in this.handlers)
            {
                handler(this);
            }
        }
    }


    class Program
    {
        public static void MostrarTitulo (Modal modal)
        {
            Console.WriteLine(modal.Title + " No anonimo");
        }

        static void Main(string[] args)
        {
            var modal = new Modal { Title = "Ventana Principal" };


            OnCloseEventHandler onCloseEventHandler = (target) =>
            {
                Console.WriteLine(target.Title);
            };

            modal.addOnCloseEventListener(onCloseEventHandler);

            modal.addOnCloseEventListener(MostrarTitulo);
            modal.Close();

            modal.removeOnCloseEventListener(onCloseEventHandler);
            modal.Close();

            Console.ReadLine();
        }
    }
}