如何在C#中迭代时从嵌套列表中移除所有项

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

class Program
{
    static void Main(string[] args)
    {
        // 嵌套列表示例
        List<object> nestedList = new List<object>
        {
            1,
            new List<object>
            {
                2,
                new List<object>
                {
                    3,
                    4
                }
            },
            5
        };

        // 移除所有项
        RemoveAllItems(nestedList);

        // 输出移除后的结果
        foreach (var item in nestedList)
        {
            Console.WriteLine(item);
        }
    }

    static void RemoveAllItems(List<object> nestedList)
    {
        for (int i = nestedList.Count - 1; i >= 0; i--)
        {
            if (nestedList[i] is List<object> nested)
            {
                // 递归移除嵌套列表中的所有项
                RemoveAllItems(nested);
                nestedList.RemoveAt(i);
            }
        }
    }
}