先用Linq查询XML节点，再转换成List或Model，再用Json.NET转为Json

好处是可以随时返回List

XML

         
             
              
       
        EricSun
               
       
        123456
               
       
        Hello I'm from Dalian
           
          
              
       
        Ray
               
       
        654321
               
       
        Hello I'm from Jilin
               
          
     

C#代码

using System;using System.Collections.Generic;using System.Linq;using System.Xml.Linq;using Newtonsoft.Json;namespace ConsoleApplication1{    class Program    {        static void Main(string[] args)        {            List
     
       list = new List
      
       ();            List
       
         list2 = new List
        
         ();            XElement rootNode = XElement.Load(@"D:\234.xml");            //第一种查询            var mynode = (from r in rootNode.Descendants("User")                          select r).ToList();            foreach (var item in mynode)            {                User model = new User();                model.name = item.Element("name").Value;                model.password = item.Element("password").Value;                model.description = item.Element("description").Value;                list.Add(model);            }            //第一种查询结束            //转换为JSON            string json = JsonConvert.SerializeObject(list);            //第二种查询            var mynode2 = from r2 in rootNode.Descendants("User")                          select new                              {                                  Name = r2.Element("name").Value,                                  Password = r2.Element("password").Value,                                  Description = r2.Element("description").Value                              };            foreach (var item in mynode2)            {                User model = new User();                model.name = item.Name;                model.password = item.Password;                model.description = item.Description;                list2.Add(model);            }           //第二种查询结束            //转换为JSON            string json2 = JsonConvert.SerializeObject(list2);            Console.ReadKey();        }    }    public class User    {        public string name { get; set; }        public string password { get; set; }        public string description { get; set; }    }}