如何以XML方式在winform中显示Xml数据？

using System;
using System.Windows.Forms;
using System.Xml;

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        string xmlString = "<root><person><name>张三</name><age>25</age></person<person><name>李四</name><age>30</age></person></root>";
        XmlDocument xmlDoc = new XmlDocument();
        xmlDoc.LoadXml(xmlString);

        TreeNode rootNode = new TreeNode("XML数据");
        treeView1.Nodes.Add(rootNode);
        AddNode(xmlDoc.ChildNodes, rootNode);
    }

    private void AddNode(XmlNodeList xmlNodeList, TreeNode treeNode)
    {
        foreach (XmlNode xmlNode in xmlNodeList)
        {
            TreeNode newNode = new TreeNode(xmlNode.Name);
            treeNode.Nodes.Add(newNode);

            if (xmlNode.HasChildNodes)
            {
                AddNode(xmlNode.ChildNodes, newNode);
            }
            else
            {
                newNode.Text = xmlNode.InnerText;
            }
        }
    }
}