从C#中的List <T>中选择N个随机元素

using System;
using System.Collections.Generic;

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

public static class RandomExtensions
{
    private static readonly Random _random = new Random();

    public static int Next(this Random random, int maxValue)
    {
        return _random.Next(maxValue);
    }
}

public static class ListHelper
{
    public static List<T> GetRandomElements<T>(this List<T> list, int count)
    {
        list.Shuffle();
        return list.GetRange(0, count);
    }
}

List<int> list = new List<int> { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
List<int> randomElements = list.GetRandomElements(5);