首先在根目录下新建一个config.xml：

XmlDocument位于System.Xml 下，是专门处理xml节点的

XElement位于System.Xml.Linq下，是可以对xml进行linq的查询操作的

分别使用XmlDocument和XElement获取节点的值：

using System;

using System.IO;

using System.Reflection;

using System.Xml;

using System.Xml.Linq;



namespace FileXml

{

    class Program

    {

        static void Main(String[] args)

        {

            //获取xml路径

            var current_dir = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);

            var xml_path = Path.Combine(current_dir, @"config.xml");



            //使用XElement快速获取节点值

            XElement xmlElement = XElement.Load(xml_path);

            String IP = xmlElement.Element("Debug").Element("Lan").Element("Server").Attribute("Ip").Value.ToString();

            Console.WriteLine(IP);

            bool isLogger = xmlElement.Element("Debug").Element("Logger").Attribute("enable").Value == "true";

            Console.WriteLine(isLogger);







            //使用XElement快速获取节点值

            XmlDocument xml_doc = new XmlDocument();

            xml_doc.Load(xml_path);

            var IP2 = xml_doc.SelectSingleNode("/Config/Debug/Lan/Server").Attributes["Ip"].Value;

            var IP2_name = xml_doc.SelectSingleNode("/Config/Debug/Lan/Server").Attributes["Ip"].Name;

            Console.WriteLine(IP2_name+":"+ IP2);

            bool isLogger2 = xml_doc.SelectSingleNode("/Config/Debug/Logger").Attributes["enable"].Value == "true";

            Console.WriteLine(isLogger2);

            Console.ReadLine();

        }

    }

}

总结：如果是简单查询 总体上来说两者差不多

感觉还是XmlDocument.SelectSingleNode(XPath)更方便一些

普通用XmlDocument就够了

Xml单例管理类：

using System;

using System.IO;

using System.Reflection;

using System.Xml;



namespace FileXml

{

    class Program

    {

        static void Main()

        {

            var ip = XmlManager.instance.XmlDoc.SelectSingleNode("/Config/Debug/Lan/Server").Attributes["Ip"].Value;

            var ip_name = XmlManager.instance.XmlDoc.SelectSingleNode("/Config/Debug/Lan/Server").Attributes["Ip"].Name;

            Console.WriteLine($"{ip_name} : {ip}");

            bool isLogger = XmlManager.instance.XmlDoc.SelectSingleNode("/Config/Debug/Logger").Attributes["enable"].Value == "true";

            Console.WriteLine(isLogger);

            Console.ReadLine();

        }

    }



    public class XmlManager

    {

        private static XmlManager _instance = null;

        public static XmlManager instance

        {

            get

            {

                if (_instance == null)

                {

                    return new XmlManager();

                }

                return _instance;

            }

        }



        private XmlDocument _xml_doc = null;

        public XmlDocument XmlDoc

        {

            get

            {

                if (_xml_doc == null)

                {

                    var current_dir = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);

                    var xml_path = Path.Combine(current_dir, @"config.xml");

                    _xml_doc = new XmlDocument();

                    _xml_doc.Load(xml_path);

                }

                return _xml_doc;

            }

        }

    }

}