دانلود برنامه خواندن سورس وب سایت با سی شارپ #C

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.IO;
namespace GetSource
{
    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();
        }

        
        private void button1_Click(object sender, EventArgs e)
        {
            Control.CheckForIllegalCrossThreadCalls = false;
            backgroundWorker1.RunWorkerAsync();
        }

        private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {

            if (textBox1.Text.Substring(0, 3).Contains("www")) textBox1.Text = "http://" + textBox1.Text;
            else if (!textBox1.Text.Substring(0, 4).Contains("http") && !textBox1.Text.Substring(0, 3).Contains("www")) textBox1.Text = "http://www." + textBox1.Text;

            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(textBox1.Text);
                HttpWebResponse res = (HttpWebResponse)req.GetResponse();
                StreamReader reader = new StreamReader(res.GetResponseStream());
                richTextBox1.Text = reader.ReadToEnd();    
        }

        private void backgroundWorker1_RunWorkerCompleted_1(object sender, RunWorkerCompletedEventArgs e)
        {
            richTextBox1.Enabled = true;
            this.Top -= 200;
            this.Height = 355 ;
        }

    }
}