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.Threading.Tasks;

using System.Windows.Forms;

​

namespace WindowsFormsApp1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

​

        private async void button1_Click(object sender, EventArgs e)

        {

            // disable button while working

            button1.Enabled = false;

​

            string url = textBox1.Text;

            // create and run webrequest

            var request = WebRequest.Create(url);

            var response = await request.GetResponseAsync();

​

            using (var sr = new StreamReader(response.GetResponseStream()))

            {

                textBox2.Text = await sr.ReadToEndAsync();

            }

​

​

            button1.Enabled = true;

        }

    }

}

​