using System;

public class Program

{

    public static void Main()

    {   

        Console.WriteLine(new Program().Increment());

        Console.WriteLine(new Program().Increment());

    }

    public Func<int> Increment = increment;

    private static Func<int> increment = new Func<Func<int>>(() =>

    {

        int num = 0;

        return () => num++;

    }).Invoke();

}