using System;

​

class C

{

    public int? data;

}

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var p = Console.WriteLine;

        var c = new C{data = 666};

        p(GetInner(c));

    }

​

    static int? GetInner(C c)

    {

        return c.data ?? 42;

    }

}