C#：选择ParentId和子文本值

using System;
using System.Collections.Generic;

public class Node
{
    public int Id { get; set; }
    public int ParentId { get; set; }
    public string Text { get; set; }
}

public class Program
{
    public static void Main()
    {
        List<Node> nodes = new List<Node>
        {
            new Node { Id = 1, ParentId = 0, Text = "Node 1" },
            new Node { Id = 2, ParentId = 1, Text = "Node 2" },
            new Node { Id = 3, ParentId = 1, Text = "Node 3" },
            new Node { Id = 4, ParentId = 2, Text = "Node 4" },
            new Node { Id = 5, ParentId = 2, Text = "Node 5" }
        };

        int parentId = 1;

        List<string> childTextValues = GetChildTextValues(nodes, parentId);

        Console.WriteLine("子文本值：");
        foreach (string textValue in childTextValues)
        {
            Console.WriteLine(textValue);
        }
    }

    public static List<string> GetChildTextValues(List<Node> nodes, int parentId)
    {
        List<string> childTextValues = new List<string>();

        foreach (Node node in nodes)
        {
            if (node.ParentId == parentId)
            {
                childTextValues.Add(node.Text);
            }
        }

        return childTextValues;
    }
}