using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Xml;
using System.Xml.Linq;
using System.IO;


public class MainClass{

   public static void Main(string[] args){   
      XDocument NewDoc = new XDocument(new XDeclaration("1.0", "utf-8", "yes"),
            new XElement("Root", "MyDoc"));  
      NewDoc.AddFirst(new XDocumentType(
               "MyDocType", "MyPubID", 
               "MySysID", "ThisInternalSubset"));


   }
}

   
     

   
  

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Xml.Linq;
public class MainClass {
    public static void Main() {
        XElement firstParticipant;
        XDocument xDocument = new XDocument(
         new XDeclaration("1.0", "UTF-8", "yes"),
         new XDocumentType("Books", null, "Books.dtd", null),
        new XProcessingInstruction("Book", "out-of-print"),
           new XElement("Books", firstParticipant =
           new XElement("Book",
           new XAttribute("type", "Author"),
       new XElement("FirstName", "J"),
         new XElement("LastName", "R")),
         new XElement("Book",
         new XAttribute("type", "Author"),
         new XElement("FirstName", "E"),
         new XElement("LastName", "B"))));
        Console.WriteLine(firstParticipant.NextNode);
    }
}

   
     

   
  

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Xml.Linq;
public class MainClass {
    public static void Main() {
        XDocument xDocument = XDocument.Load("book.xml",LoadOptions.SetBaseUri | LoadOptions.SetLineInfo);
        Console.WriteLine(xDocument);
        XElement firstName = xDocument.Descendants("FirstName").First();

        Console.WriteLine("FirstName Line:{0} Position:{1}",((IXmlLineInfo)firstName).LineNumber,((IXmlLineInfo)firstName).LinePosition);
        Console.WriteLine("FirstName Base URI:{0}", firstName.BaseUri);

    }
}

   
     

   
  

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Xml.Linq;
public class MainClass {
    public static void Main() {


        XDocument xDocument = new XDocument(
         new XElement("Books",
           new XElement("Book",
           new XAttribute("type", "Author"),
           new XAttribute("experience", "first-time"),
           new XAttribute("language", "English"),
           new XElement("FirstName", "J"),
           new XElement("LastName", "R"))));

        xDocument.Save("book.xml");
    }
}

   
     

   
  


using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Xml.Linq;
public class MainClass {
    public static void Main() {
        XDocument xDocument = new XDocument(
          new XElement("Books",
          new XElement("Book",
          new XAttribute("type", "Author"),
          new XElement("FirstName", "J"),
          new XElement("LastName", "R")),
          new XElement("Book",
          new XAttribute("type", "Author"),
          new XElement("FirstName", "E"),
          new XElement("LastName", "B"))));

        IEnumerable<XElement> elements =
          xDocument.Element("Books").Elements("Book");
        foreach (XElement element in elements) {
            Console.WriteLine("Source element: {0} : value= {1}",element.Name, element.Value);
        }
        foreach (XElement element in elements) {
            Console.WriteLine("Removing {0}= {1} &iexcl;­", element.Name, element.Value);
            element.Remove();
        }
        Console.WriteLine(xDocument);
    }
}

   
     

   
  

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Xml.Linq;
public class MainClass {
    public static void Main() {

        XDocument xDocument = new XDocument(
          new XDeclaration("1.0", "UTF-8", "yes"),
          new XDocumentType("Books", null, "Books.dtd", null),
          new XProcessingInstruction("Book", "out-of-print"),
          new XElement("Books"));
        Console.WriteLine(xDocument);
    }
}

   
     

   
  

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Xml;
using System.Xml.Linq;
public class MainClass {
    public static void Main() {
        XDocument xDocument =
         new XDocument(
         new XElement("Books",
         new XElement("Book",
         new XAttribute("type", "Author"),
         new XElement("FirstName", "J"),
         new XElement("LastName", "R"))));
        Console.WriteLine(xDocument.ToString());
    }
}