using System;

using System.Linq;

using System.Collections.Generic;

using System.Diagnostics;

​

public delegate int TestDelegate(int s);

​

public class NotObvious

    {

        public TestDelegate test;

    public NotObvious(TestDelegate t){

        test=t; 

    }

    public static TestDelegate Before = x => x;

    public static NotObvious BeforeNotObvious = new NotObvious(Before);

    public static NotObvious AfterNotObvious = new NotObvious(After);

    public static TestDelegate After = x => x;

    public static NotObvious AfterNotObvious2 = new NotObvious(After2);

    public static int After2(int s){return s;}

}

​

public class Program

{

    public static void Main()

    {

        var before = NotObvious.BeforeNotObvious;

        var after = NotObvious.AfterNotObvious;

        var after2 = NotObvious.AfterNotObvious2;

        Console.WriteLine($"before.test is null {before.test==null}");

        Console.WriteLine($"after.test is null {after.test==null}");

        Console.WriteLine($"after2.test is null {after2.test==null}");

    }

}