using System;

using System.Linq;

using System.Collections.Generic;

​

/*

Implement infinite scroll by writing a method which takes an IEnumberable<T> 

and returns an IEnumerable<T>.  The returned enumerable should endlessly 

enumerate over the enumerable which it was given.  Shortest code wins.

*/

public class Program

{

    public static void Main()

    {

        var i = InfiniteLoop(new[]{1,2,3,4,5});

        var iterations = 0;

        foreach (var j in i.Take(500)) 

        {

            Console.WriteLine("[{0}] - {1}", iterations, j);

            iterations ++;

        }

    }

    public static IEnumerable<T> InfiniteLoop<T>(IEnumerable<T> input) 

    {

        var iter = input.GetEnumerator();

        while(true)

        {

            while(iter.MoveNext())

            {

                yield return iter.Current;          

            }       

            iter.Reset();

        }

    }

}

​