using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        PrintNumbers();

    }

​

    private static IEnumerable<int> Integers()

    {

        var i = 0;

        while (true)

        {

            Console.WriteLine("Inside iterator: " + i);

            yield return i;

            i++;

        }

    }

​

    private static void PrintNumbers()

    {

        var numbers = Integers().Take(3);

        Console.WriteLine("Starting iteration");

        foreach (var number in numbers)

        {

            Console.WriteLine("Inside foreach: " + number);

        }

    }

}