使用LINQ将列表拆分为子列表

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

class Program
{
    static void Main()
    {
        List<int> numbers = new List<int> { 1, 2, 3, 4, 5, 6, 7, 8, 9 };

        int size = 3;

        var result = numbers.Select((x, i) => new { Index = i, Value = x })
                           .GroupBy(x => x.Index / size)
                           .Select(x => x.Select(v => v.Value).ToList())
                           .ToList();

        foreach (var sublist in result)
        {
            Console.WriteLine(string.Join(", ", sublist));
        }
    }
}