﻿using System;
using System.Collections.Generic;

namespace CSCL
{
    public static class ListExtensions
    {
        public static void Shuffle<T>(this IList<T> list)
        {
            Random rng=new Random();
            int n=list.Count;
            while(n>1)
            {
                n--;
                int k=rng.Next(n+1);
                T value=list[k];
                list[k]=list[n];
                list[n]=value;
            }
        }
    }
}

