Replace this node with the specified content in CSharp

  //from   w w w . ja  va  2s. co  m
    
using System;
using System.IO;
using System.Xml;
using System.Xml.Linq;
using System.Collections;
using System.Collections.Generic;

public class MainClass{
   public static void Main(){
        XElement xmlTree = new XElement("Root",
            new XElement("A1", "A1 content"),
            new XElement("A2", "A2 content"),
            new XElement("A3", "A3 content"),
            new XElement("A4", "A4 content"),
            new XElement("A5", "A5 content")
        );
        XElement child3 = xmlTree.Element("A3");
        child3.ReplaceWith(
            new XElement("NewA", "new content")
        );
        Console.WriteLine(xmlTree);
   }
}