Set the value of a child element, adds a child element, or removes a child element in CSharp

using System;/*  w w  w .ja  va  2 s.c o  m*/
using System.Linq;
using System.Xml.Linq;
using System.Collections;
using System.Collections.Generic;


public class MainClass{
   public static void Main(){

        XElement root = new XElement("Root");
        
        root.SetElementValue("Ele1", 1);
        root.SetElementValue("Ele2", 2);
        root.SetElementValue("Ele3", 3);
        Console.WriteLine(root);
        
        root.SetElementValue("Ele2", 22);
        Console.WriteLine(root);
        
        root.SetElementValue("Ele3", null);
        Console.WriteLine(root);
   }
}