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

namespace XElementReading
{
    class Program
    {
        static string myxml =
           @"<root>
                <one xmlns:a=‘http://cnkker.com‘>
                    <a:oneone xmlns:b=‘http://taoqi.com.cn‘>
                        <b:id>1</b:id>
                        <b:name></b:name>
                    </a:oneone>
                    <a:twotwo xmlns:b=‘http://www.qq.com‘>
                        <b:id>2</b:id>
                        <b:name></b:name>
                    </a:twotwo>
                </one>
              </root>";

        static void Main(string[] args)
        {
            var elem = XElement.Parse(myxml);
            XNamespace nsr = "http://cnkker.com";
            XNamespace nsy = "http://taoqi.com.cn";
            var t = elem.Element("one").Element(nsr + "oneone").Element(nsy + "id").Value;
            Console.WriteLine("Value of id within oneone: {0}", t);    
            Console.ReadLine();
        }
    }
}