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public static string send (string url, string text)
    {
      try
      {
        WebClient wc = new WebClient();
        NameValueCollection myNameValueCollection = new NameValueCollection();
        myNameValueCollection.Add("bob",text);
        byte[] responseArray = wc.UploadValues(url,"POST",myNameValueCollection);
      
        return "UploadSuccess";
      }
      catch
      {
        return "UploadError";
      }
    }                    

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send("www.server-de/eingabe.php?bob=", "test");