如何在c# windows窗体应用程序中使用层次结构id

using System;
using System.Windows.Forms;

namespace WindowsFormsApp
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }

        private void MainForm_Load(object sender, EventArgs e)
        {
            // 定义一个层次结构的数据结构
            // 这里使用一个简单的示例，仅包含ID和名称两个属性
            class Node
            {
                public int ID { get; set; }
                public string Name { get; set; }
                public int ParentID { get; set; }
            }

            // 创建一个层次结构的数据集合
            var nodes = new[]
            {
                new Node { ID = 1, Name = "Node 1", ParentID = 0 },
                new Node { ID = 2, Name = "Node 1.1", ParentID = 1 },
                new Node { ID = 3, Name = "Node 1.2", ParentID = 1 },
                new Node { ID = 4, Name = "Node 1.2.1", ParentID = 3 },
                new Node { ID = 5, Name = "Node 2", ParentID = 0 },
                new Node { ID = 6, Name = "Node 2.1", ParentID = 5 },
                new Node { ID = 7, Name = "Node 2.2", ParentID = 5 },
            };

            // 递归方法，用于构建TreeView的层次结构
            void BuildTree(TreeNodeCollection nodes, int parentID)
            {
                foreach (var node in nodes)
                {
                    if (node.ParentID == parentID)
                    {
                        var treeNode = new TreeNode(node.Name);
                        treeNode.Tag = node.ID;
                        nodes.Add(treeNode);
                        BuildTree(treeNode.Nodes, node.ID);
                    }
                }
            }

            // 绑定数据到TreeView控件
            BuildTree(treeView.Nodes, 0);
        }
    }
}