Pokebot pokeall

private void pokeall_Click(object sender, EventArgs e)  //pokes all friends on facebook
        {

            webBrowser1.Navigate("http://www.facebook.com/friends/edit/");
            Thread.Sleep(2000);
            findfriends();
        }

private void findfriends()
        {
            foreach (HtmlElement element in this.webBrowser1.Document.GetElementsByTagName("li"))
            {
                if (element.GetAttribute("data-label").Equals("All Friends"))
                {
                    element.InvokeMember("click");
                    label4.Text = webBrowser1.Url.ToString();
                }
            }
        }