OLX web Scaper

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

namespace OLX_Scraper
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        string  getwebsitecontent(string url)
        {
            string html = String.Empty;
            WebRequest request = WebRequest.Create(url);
            WebResponse response = request.GetResponse();
            Stream data = response.GetResponseStream();

            using (StreamReader sr = new StreamReader(data))
            {
                html =  sr.ReadToEnd();
            }

            return html+"hjhgjhgjh";

        }

        private void button1_Click(object sender, EventArgs e)
        {
            bg.CancelAsync();
        }

        private void button2_Click(object sender, EventArgs e)
        {


        }

        BackgroundWorker bg = new BackgroundWorker();

        private void button3_Click(object sender, EventArgs e)
        {


                for (int pages = 1; pages <= numericUpDown1.Value; pages++)
                {
                    string url = "https://www.olx.com.pk/mobile-phones/?page=" + pages;


                    var links = Regex.Matches(getwebsitecontent(url).ToString(), "<a href=\"([^<]*)\" class=\"marginright5 link linkWithHash detailsLink\">");
                    foreach (Match match in links)
                    {

                        richTextBox1.Text += match.Groups[1].Value + "\n";

                    }

                    var location = Regex.Matches(getwebsitecontent(url).ToString(), "<span>([^<]*)</span>                                                       </small>");
                    foreach (Match match in location)
                    {
                        richTextBox2.Text += match.Groups[1].Value + "\n";

                    }


                    var price = Regex.Matches(getwebsitecontent(url).ToString(), "<strong class=\"c000\">([^<]*)</strong>");
                    foreach (Match match in price)
                    {

                        richTextBox3.Text += match.Groups[1].Value.Trim().Trim().Trim().Trim().Trim().Trim() + '\n';

                    }

                    var time = Regex.Matches(getwebsitecontent(url).ToString(), "<p class=\"color-9 lheight14 margintop3 small\">([^<]*)</p>");

                    foreach (Match match in time)
                    {

                        richTextBox4.Text += match.Groups[1].Value + "\n";

                    }

                    char delimiterChars = '\n';
                    string[] linker = richTextBox1.Text.Split(delimiterChars);
                    string[] locationer = richTextBox2.Text.Split(delimiterChars);
                    string[] pricer = richTextBox3.Text.Split(delimiterChars);
                    string[] eimerx = richTextBox4.Text.Split(delimiterChars);
                    progressBar1.Maximum = linker.Length - 1;
                    for (int i = 0; i < linker.Length - 1; i++)
                    {
                        if (i == 0) { i++; }
                        progressBar1.Value = i;
                        this.dataGridView1.Rows.Add(i, linker[i], locationer[i], pricer[i], eimerx[i]);
                    }
                }


        }
        //5d329

        private void button6_Click(object sender, EventArgs e)
        {
            char delimiterChars = '\n';
            string[] urlz = richTextBox5.Text.Split(delimiterChars);

            for (int i = 0; i < urlz.Length - 1; i++)
            {
                richTextBox6.Text += getwebsitecontent(urlz[i].ToString().Trim('\n'));
            }
        }
    }
}