C# Events and Delegates example, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Microsoft (R) Visual C# Compiler version 2.9.0.63208 (958f2354)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            Video vid = new Video("Exciting new content!");
            VideoUploader uploader = new VideoUploader();
            Subscriber sub = new Subscriber();
            Bells bell = new Bells();
            
            uploader.Uploaded += sub.NotifySubscribers;
            uploader.Uploaded += bell.NotifyBells;
            
            uploader.Upload(vid);
        }
    }

class VideoUploader
    {
        public delegate void UploadedHandler();
        
        public event UploadedHandler Uploaded;
        
        public void Upload(Video vid) {
            Console.WriteLine("Uploading new video...");
            OnUploaded();
        }
        
        public void OnUploaded() {
            Console.WriteLine("Finished uploading.");
            Uploaded();
        }
    }
    
    class Video
    {
        public string videoName;
        
        public Video (string videoName) {
            this.videoName = videoName;
        }
    }
    
    class Subscriber
    {
        public void NotifySubscribers() {
            Console.WriteLine("A new video has been uploaded!");
        }
    }
    
    class Bells
    {
       public void NotifyBells() {
           Console.WriteLine("Notified!");
       } 
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,26 sec, absolute running time: 0,11 sec, cpu time: 0,09 sec, average memory usage: 13 Mb, average nr of threads: 2, absolute service time: 0,4 sec