How to scrape all the details from a web site.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using HtmlAgilityPack;
using System.Net;



namespace Project_1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            ServicePointManager.Expect100Continue = true;
            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            

            
            HtmlWeb myweb = new HtmlWeb();
            int page=0;
            HtmlAgilityPack.HtmlDocument doc=null;
           
            for (page = 1; page <= 5; page++)
            {
                doc = myweb.Load("https://www.practo.com/jamnagar/doctors" + "?page=" + page);
               var headernames = (doc.DocumentNode.SelectNodes("//h2[@class='doctor-name']")).ToList();
               foreach (var item in headernames)
               {
                   listBox1.Items.Add(item.WriteContentTo());
               }

            
               
            }

    
                   
               

              

           }
        }
    }