XML解析:对节点上的C#进行分组，然后在同一组下进行subGroup

using System;
using System.Xml;
using System.Xml.XPath;

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

        // 创建XPath导航器
        XPathNavigator navigator = xmlDoc.CreateNavigator();

        // 使用XPath表达式选择所有的C#节点
        XPathNodeIterator csharpNodes = navigator.Select("//C#");

        // 遍历C#节点进行分组和子分组
        while (csharpNodes.MoveNext())
        {
            XPathNavigator csharpNode = csharpNodes.Current;

            // 获取分组属性值
            string group = csharpNode.GetAttribute("group", "");

            // 输出分组信息
            Console.WriteLine("Group: " + group);

            // 使用XPath表达式选择同一组下的所有subGroup节点
            XPathNodeIterator subGroupNodes = csharpNode.Select("subGroup");

            // 遍历subGroup节点
            while (subGroupNodes.MoveNext())
            {
                XPathNavigator subGroupNode = subGroupNodes.Current;

                // 获取subGroup节点的值
                string subGroupValue = subGroupNode.Value;

                // 输出subGroup节点的值
                Console.WriteLine("SubGroup: " + subGroupValue);
            }
        }
    }
}