InitializeComponent();
            // Create a request object  
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(new Uri("http://localhost/test.php"));
            OpenFileDialog dlg = new OpenFileDialog();
            if (dlg.ShowDialog().Value)
            {
                request.PostMultiPartAsync(new Dictionary<string, object> { { "x", "1" }, { "y", dlg.File } }, new AsyncCallback(asyncResult =>
                {
                    HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(asyncResult);

                    Stream responseStream = response.GetResponseStream();
                    StreamReader reader = new StreamReader(responseStream);
                    this.Dispatcher.BeginInvoke(delegate
                    {
                        output.Text = reader.ReadToEnd();
                        response.Close();
                    });
                }));
            }