Event test, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

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

class Base
{
    public static void Boo() {Console.WriteLine("Boo!");}
    public static void Do() {Console.WriteLine("DoBase!");}
}
class Derived : Base
{
    public static void Do() {Console.WriteLine("DoDerived!");}
    public static event Action<int> SomethingChanged;
    private static HashSet<Action<int>> includeInSomethingChanged = new HashSet<Action<int>>();
    public static void IncludeInSuperSomethingChanged(Action<int> callback)
    {
        includeInSomethingChanged.Add(callback);
    }
    public static void OnSomethingChanged(bool isSuperSomethingChanged)
    {
        foreach (Action<int> callback in SomethingChanged.GetInvocationList()) 
        {
            if (!isSuperSomethingChanged || includeInSomethingChanged.Contains(callback))
            {
                callback(2);
            }
        }
    }
}

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            new Program().Run();
        }
        
        public void Run()
        {
            //Your code goes here
            Console.WriteLine("Hello, world!");
            
            Derived.Boo();
            Derived.Do();
            
            Derived.SomethingChanged += OnSomethingChanged;
            Derived.SomethingChanged += OnSuperSomethingChanged;
            Derived.IncludeInSuperSomethingChanged(OnSuperSomethingChanged);
            
            Derived.OnSomethingChanged(false);
            Derived.OnSomethingChanged(true);
        }
        
        void OnSomethingChanged(int i)
        {
            Console.WriteLine(i);
        }
        void OnSuperSomethingChanged(int i)
        {
            Console.WriteLine("Super!" + i);
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,12 sec, absolute running time: 0,11 sec, cpu time: 0,11 sec, average memory usage: 15 Mb, average nr of threads: 3