C# Hjælp

Kode 

            System.Net.WebRequest webReq = System.Net.WebRequest.Create("http://www.n.dk/community/info/Banned.aspx?UserID=" + textBox1.Text)
            System.Net.WebResponse webRes = webReq.GetResponse();
            System.IO.StreamReader SR = new System.IO.StreamReader(webRes.GetResponseStream());

            string response = SR.ReadToEnd();
             response = response.Substring(response.IndexOf("http://www.n.dk/community/info/Banned.aspx?UserID=" + textBox1.Text);
            richTextBox1.Text = response;