private void button1_Click(object sender, EventArgs e) { _oauth["consumer_key"] = MY_APP_SPECIFIC_CONSUMER_KEY; _oauth["consumer_secret"] = MY_APP_SPECIFIC_CONSUMER_SECRET; _oauth.AcquireRequestToken(URL_REQUEST_TOKEN, "POST"); var url = SERVICE_SPECIFIC_AUTHORIZE_URL_STUB + _oauth["token"]; webBrowser1.Visible = true; webBrowser1.Url = new Uri(url); // FOR EXTERNAL BROWSER: System.Diagnostics.Process.Start(url); //testSubmit(); }