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private void button1_Click(object sender, EventArgs e)
        {
            string googleUriPattern =
        "http://<url>/insertid?prename={0}&lastname={1}&twitter={2}&message={3}";
            var requestUri = new Uri(
                string.Format(
                    googleUriPattern,
                    "Horst", //Wird für {0} eingesetzt
                    "Meyer", //wird für {1} eingesetzt
                    "HorstMeyer2",
                    "Horst Meyer ist auf Twitter!"
                ));

            var httpWebRequest = (HttpWebRequest)WebRequest.Create(requestUri);
            httpWebRequest.Timeout = 5000;

            using (var webResponse = httpWebRequest.GetResponse())
            using (var sr = new StreamReader(webResponse.GetResponseStream()))
            {
                textBox1.Text = sr.ReadToEnd();
            }
        }