C# Linq查询 XML Object

Demo 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Linq;

namespace LinqDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            var InputArray = new List<int>();
            for(int i=1; i < 10; i++)
            {
                InputArray.Add(i);
            }

            Console.WriteLine("使用 Linq to Object 查询结果：");
            LinqToObjectQuery(InputArray);
        
            Console.WriteLine("使用 Linq to XML 查询结果：");
            LinqToXML();

            Console.Read();
        }
        /// <summary>
        /// Linq Object 查询
        /// </summary>
        /// <param name="collection"></param>
        private static void LinqToObjectQuery(List<int> collection)
        {
            var queryResult = from item in collection
                              where item % 2 == 0
                              select item;
            foreach(var item in queryResult)
            {
                Console.Write(item + " ");
            }
            Console.WriteLine();
        }

        private static void LinqToXML()
        {
            //导入XML
            XElement xmlDoc = XElement.Parse(xmlString);
            var queryResult = from element in xmlDoc.Elements("Person")
                              where element.Element("Name").Value == "Allen"
                              select element;
            foreach(var element in queryResult)
            {
                Console.WriteLine("Name:" + element.Element("Name").Value + " id为：" + element.Attribute("id").Value);
            }
        }

        private static string xmlString =
            "<Persons>" +
                "<Person id='1'>" +
                    "<Name>Allen</Name>" +
                    "<Age>18</Age>" +
                "</Person>" +
                "<Person id='2'>" +
                    "<Name>Bill</Name>" +
                    "<Age>20</Age>" +
                "</Person>" +
            "</Persons>";
    }
}