如何在c#中搜索标签标签属性？

<?xml version="1.0" encoding="UTF-8"?>
<Books>
    <Book id="1">
        <Title>CLR via C#</Title>
        <Author>Serge Lidin</Author>
    </Book>
    <Book id="2">
        <Title>Pro C# 7</Title>
        <Author>Andrew Troelsen</Author>
    </Book>
</Books>

using System;
using System.Xml;

class Program
{
    static void Main()
    {
        // 加载XML文档
        XmlDocument xmlDoc = new XmlDocument();
        xmlDoc.Load("path_to_your_xml_file.xml");

        // 创建XPath查询字符串，搜索所有的Book元素
        string xpathQuery = "//Book";

        // 执行XPath查询
        XmlNodeList bookNodes = xmlDoc.SelectNodes(xpathQuery);

        // 遍历所有Book元素并打印id属性
        foreach (XmlNode bookNode in bookNodes)
        {
            // 获取id属性
            XmlAttribute idAttribute = bookNode.Attributes["id"];
            if (idAttribute != null)
            {
                Console.WriteLine("Book ID: " + idAttribute.Value);
            }
        }
    }
}