Add new node(Element) in existing xml file in C#.Net

first make form like :




-  now double click on button and write code like :

/////////////////////////   CODE    ////////////////////////////


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

namespace Xml_File_Operation
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
         private void button3_Click(object sender, EventArgs e)
        {

           
               XmlDocument xdoc1 = new XmlDocument();
                xdoc1.Load("C:\\Users\\Nirav\\Desktop\\people1.xml");
                XmlNode person = xdoc1.CreateElement("person");
                XmlNode name = xdoc1.CreateElement("name");
                name.InnerText = textBox1.Text;
                person.AppendChild(name);

                XmlNode age = xdoc1.CreateElement("age");
                age.InnerText = numericUpDown1.Value.ToString();
                person.AppendChild(age);

                XmlNode email= xdoc1.CreateElement("email");
                email.InnerText = textBox3.Text;
                person.AppendChild(email);

                xdoc1.DocumentElement.AppendChild(person);
                xdoc1.Save("C:\\Users\\Nirav\\Desktop\\people1.xml");

            }

      }
}


//////////////////         OUTPUT      ////////////////////////



it make chanch like :


                  




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