Linq: lists of lists

gistfile1.txt

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

public static class EnumerableExtractRangeEx
{
	public static IEnumerable<IEnumerable<T>> ExtractRanges<T>(this IEnumerable<T> source, Func<T, bool> rangePredicate)
	{
		using (var enumerator = source.GetEnumerator())
		{
			while (enumerator.MoveNext())
			{
				if (rangePredicate(enumerator.Current))
					yield return YieldWhileTrue(enumerator, rangePredicate);
			}
		}
	}
	
	public static IEnumerable<T> YieldWhileTrue<T>(IEnumerator<T> enumerator, Func<T, bool> predicate)
	{
		do
		{
			yield return enumerator.Current;
		}
		while (enumerator.MoveNext() && predicate(enumerator.Current));
	}
}


public class Program
{
	public static void Main()
	{
		foreach (var r in 
				 new [] { 1, 3, 4, 2, 8, 12, 7, 2, 9, 3, 8, 3, 7, 2, 6, 7, 5, 8, 9, 4, 3, 1, 2, 4 }
				 .ExtractRanges(x => x % 2 == 0).Select(r => r.ToList()))
		{
			Console.WriteLine("Count: " + r.Count());
			foreach (var n in r)
				Console.WriteLine(n);
		}
	}
}