Csharp/C Sharp/XML LINQ/XElement Update

Updating a Node"s Value

<source lang="csharp"> 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 XElement("Books", firstParticipant =
           new XElement("Book",
             new XComment("This is a new author."),
             new XAttribute("type", "Author"),
             new XElement("FirstName", "J"),
             new XElement("LastName", "R"))));
       Console.WriteLine(xDocument);
       firstParticipant.Element("FirstName").Value = "J";
       firstParticipant.Nodes().OfType<XComment>().Single().Value ="LINQ";
       ((XElement)firstParticipant.Element("FirstName").NextNode).Nodes().OfType<XText>().Single().Value = "R";
       Console.WriteLine(xDocument);
   }

}

</source>

Updating a Processing Instruction

<source lang="csharp"> 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() {
       XProcessingInstruction procInst;
       XDocument xDocument = new XDocument(
         new XElement("Books"),
         procInst = new XProcessingInstruction("Book", "out-of-print"));
       Console.WriteLine(xDocument);
       procInst.Target = "BookContactManager";
       procInst.Data = "update";
       Console.WriteLine(xDocument);
   }

}

</source>

Updating the Document Type

<source lang="csharp"> 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() {
       XDocumentType docType;
       XDocument xDocument = new XDocument(docType = new XDocumentType("Books", null,"Books.dtd", null),
         new XElement("Books"));
       Console.WriteLine("Before updating document type:");
       Console.WriteLine(xDocument);
       docType.Name = "MyBooks";
       docType.SystemId = "http://www.yoursite.ru/DTDs/MyBooks.DTD";
       docType.PublicId = "-//DTDs//TEXT Book Participants//EN";
       Console.WriteLine(xDocument);
   }

}

</source>