将嵌套数组类转换为另一个嵌套数组类c#

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

public class Program
{
    public static void Main()
    {
        // 原始的嵌套数组类
        List<List<int>> nestedArray = new List<List<int>>
        {
            new List<int> {1, 2, 3},
            new List<int> {4, 5, 6},
            new List<int> {7, 8, 9}
        };

        // 使用LINQ进行转换
        List<List<string>> convertedArray = nestedArray.Select(list => list.Select(item => item.ToString()).ToList()).ToList();

        // 输出转换后的结果
        foreach (var list in convertedArray)
        {
            Console.WriteLine(string.Join(", ", list));
        }
    }
}

1, 2, 3
4, 5, 6
7, 8, 9