XML LINQ C#


            using System;
using System.Linq;
using System.Xml.Linq;
using System.Collections;
using System.Collections.Generic;
public class MainClass{
   public static void Main(){
        string internalSubset = @"
        
        
        ";
        
        string target = "xml-stylesheet";
        string data = "href='mystyle.css' title='Compact' type='text/css'";
        
        XDocument doc = new XDocument(
            new XComment("This is a comment."),
            new XProcessingInstruction(target, data),
            new XDocumentType("Pubs", null, null, internalSubset),
            new XElement("Pubs", 
                new XElement("Book",
                    new XElement("Title", "C#"),
                    new XElement("Author", "Name")
                )
            ),
            new XComment("This is another comment.")
        );
        doc.Declaration = new XDeclaration("1.0", "utf-8", "true");
        Console.WriteLine(doc);
        
        doc.Save("test.xml");
   }
}