playing with linq as I first try C#

mtf.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;

namespace mtf
{
	class Squares : IEnumerable
	{
		private System.Collections.Generic.List<BigInteger> values;

		public Squares (BigInteger limit)
		{
			values = BigIntegers().Select (x => x * x).TakeWhile (x => (x <= limit)).ToList ();
		}

		public System.Collections.IEnumerator GetEnumerator ()
		{
			return values.GetEnumerator ();
		}
		
		private IEnumerable<BigInteger> BigIntegers ()
		{
			BigInteger value = 0;
			
			while (true) {
				yield return value++;
			}
		}
	}


	class MainClass
	{
		public static void Main (string[] args)
		{
			var limit = 345;
			
			Console.WriteLine ("Printing all squares up to " + limit.ToString () + ":");
			foreach (var n in new Squares (limit)) {
				Console.WriteLine (n);
			}
		}
	}
}