using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

namespace EventsExercise

{

    public delegate void EventHandler();

​

    public class Program

    {

        public static event EventHandler subscribe;

​

        static void Main(string[] args)

        {

            Button btn1 = new Button("Armando");

            subscribe += new EventHandler(btn1.Subscribe);

​

            Button btn2 = new Button("Elizabeth");

            subscribe += new EventHandler(btn2.Subscribe);

​

            subscribe.Invoke();

        }

    }

​

    public class Button

    {

        public string Name { get; set; }

​

        public Button(string name)

        {

            this.Name = name;

        }

​

        public void Subscribe()

        {

            Console.WriteLine($"Succesfully subscribed, {this.Name}");

        }

    }

}