如何在C#中从xml字符串中获取节点值？

using System;
using System.Xml;

public class Program
{
    public static void Main()
    {
        string xmlString = "<root><name>John Doe</name><age>30</age></root>";
        
        // 创建XmlDocument对象
        XmlDocument xmlDoc = new XmlDocument();
        xmlDoc.LoadXml(xmlString);
        
        // 获取根节点
        XmlNode root = xmlDoc.DocumentElement;
        
        // 获取name节点的值
        XmlNode nameNode = root.SelectSingleNode("name");
        string name = nameNode.InnerText;
        Console.WriteLine("Name: " + name);
        
        // 获取age节点的值
        XmlNode ageNode = root.SelectSingleNode("age");
        int age = Convert.ToInt32(ageNode.InnerText);
        Console.WriteLine("Age: " + age);
    }
}

Name: John Doe
Age: 30