Csharp/C Sharp/XML LINQ/SetElementValue

Using SetElementValue to Update, Add, and Delete Child Elements

 
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 XAttribute("type", "Author"),
              new XElement("FirstName", "J"),
              new XElement("LastName", "R"))));
        Console.WriteLine(xDocument);
        firstParticipant.SetElementValue("FirstName", "Joseph");
        firstParticipant.SetElementValue("MiddleInitial", "C");
        firstParticipant.SetElementValue("LastName", null);
        Console.WriteLine(xDocument);
    }
}