gistfile1.cs

 private void button2_Click(object sender, EventArgs e)
        {
            ReadFromTheInternets internetReader = new ReadFromTheInternets("http://stinaq.me/license.txt", richTextBox1);

            Thread myThread = new Thread(new ThreadStart(internetReader.ReadWebPage));
            myThread.Start();
        }
        
class ReadFromTheInternets
    {

        HttpWebRequest request;
        RichTextBox textBox;

        public ReadFromTheInternets(string url, RichTextBox textBox)
        {
            request = (HttpWebRequest) WebRequest.Create(url);
            this.textBox = textBox;
        }

        public void ReadWebPage()
        {
            StringBuilder sb = new StringBuilder();
            byte[] buf = new byte[8192];

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();

            Stream resStream = response.GetResponseStream();
            string tempString = null;

            int count = 0;

            do
            {
                count = resStream.Read(buf, 0, buf.Length);

                if (count != 0)
                {
                    tempString = Encoding.ASCII.GetString(buf, 0, count);

                    sb.Append(tempString);
                }
            }
            while (count > 0);
            MessageBox.Show(sb.ToString());
            System.IO.File.WriteAllText(@"C:\Users\Stina\Desktop\test.txt", sb.ToString());
           
        }
    }