Simple Example of Event in C#

using System;
namespace ConsoleApp1
{
    public class Magazine
    {
        // Define a delegate for the event
        public delegate void NewIssueEventHandler();

        // Define an event based on the delegate
        public event NewIssueEventHandler NewIssueReleased;

        // Method to publish a new issue
        public void PublishNewIssue()
        {
            Console.WriteLine("Magazine: Publishing new issue.");
            OnNewIssueReleased();
        }

        // Method to raise the event
        private void OnNewIssueReleased()
        {
            if (NewIssueReleased != null)
            {
                NewIssueReleased();
            }
        }
    }

    public class Reader
    {
        private string name;

        public Reader(string name)
        {
            this.name = name;
        }

        // Event handler method
        public void ReceiveNewIssue()
        {
            Console.WriteLine($"{name} received the new issue.");
        }
    }

    public class Program
    {
        public static void Main(string[] args)
        {
            // Create an instance of the Magazine (Publisher)
            Magazine magazine = new Magazine();

            // Create instances of Readers (Subscribers)
            Reader reader1 = new Reader("Alice");
            Reader reader2 = new Reader("Bob");

            // Subscribe to the NewIssueReleased event
            magazine.NewIssueReleased += reader1.ReceiveNewIssue;
            magazine.NewIssueReleased += reader2.ReceiveNewIssue;

            // Publish new issues
            magazine.PublishNewIssue();
            magazine.PublishNewIssue();
        }
    }

}