using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    private static int i = 0;

    public static void Main()

    {

        var y = Generator().Take(100).Where(i => i < 6).Select(i => i);

​

        Console.WriteLine(y.Count());

​

        foreach (var z in y)

        {

            Console.WriteLine(z);

        }

​

        Console.WriteLine(y.Count());

    }

    public static IEnumerable<int> Generator()

    {

        for(; i < int.MaxValue; i++)

        {

            yield return i;

        }

    }

}