How I can show display specific data from XML in c#

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C#

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XML-documentation

i have xml file in this file some data through book ID wise. i want to show specific Book ID detail in C# (Console Base Program) but i face an error what should i do where is my mistake please explain and solve my problem i m pasitng my XML file code as well as C# code.

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XML CODE
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<?xml version="1.0"?>
<catalog><![CDATA[C#'s operators include : < > &]]>
   <book id="bk101">
      <author>Gambardella, Matthew</author>
      <title>XML Developer's Guide</title>
      <genre>Computer</genre>
      <price>44.95</price>
      <publish_date>2000-10-01</publish_date>
      <description>An in-depth look at creating applications
      with XML.</description>
   </book>
   <book id="bk102">
      <author>Ralls, Kim</author>
      <title>Midnight Rain</title>
      <genre>Fantasy</genre>
      <price>5.95</price>
      <publish_date>2000-12-16</publish_date>
      <description>A former architect battles corporate zombies,
      an evil sorceress, and her own childhood to become queen
      of the world.</description>
   </book>

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C# CODE
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;

namespace XMLPractice
{
    class Program
    {
        static void Main(string[] args)
        {
 XmlDocument xmldocument = new XmlDocument();
            xmldocument.Load("D:\\inventory.xml");
            XmlElement objxmlelement = xmldocument.DocumentElement;
            XmlNode xmlnode = objxmlelement.SelectSingleNode("book [@id=bk101]");
            Console.WriteLine(xmlnode.InnerText);
            Console.ReadKey();
        }
    }
}