using System;

using System.Collections.Generic;

public class ListExtension<T> : List<T>

{

    public List<List<T>> grouped(int groupSize) {

        return null;    

    }

    public static void Main()

    {

        ListExtension<int> xs = new ListExtension<int>();

        for (int i = 0; i < 100; i++)

            xs.Add(i);

        List<List<int>> output = xs.grouped(8);

        Console.WriteLine(output.ToString());

    }

}