fCraft.ConfigGUI.MainForm.bPortCheck_Click C# (CSharp) Метод

        private void bPortCheck_Click( object sender, EventArgs e )
        {
            bPortCheck.Text = "Checking";
            Enabled = false;
            TcpListener listener = null;

            try {
                listener = new TcpListener( IPAddress.Any, ( int )nPort.Value );
                listener.Start();

                HttpWebRequest request = ( HttpWebRequest )WebRequest.Create( "http://www.utorrent.com/testport?plain=1&port=" + nPort.Value );
                HttpWebResponse response = ( HttpWebResponse )request.GetResponse();

                if ( response.StatusCode == HttpStatusCode.OK ) {
                    using ( Stream stream = response.GetResponseStream() ) {
                        if ( stream != null ) {
                            StreamReader reader = new StreamReader( stream );
                            string returnMessage = reader.ReadLine();
                            if ( returnMessage != null && returnMessage.StartsWith( "ok" ) ) {
                                MessageBox.Show( "Port " + nPort.Value + " is open!", "Port check success" );
                                return;
                            }
                        }
                    }
                }
                MessageBox.Show( "Port " + nPort.Value + " is closed. You will need to set up forwarding.", "Port check failed" );
            } catch {
                MessageBox.Show( "Could not start listening on port " + nPort.Value + ". Another program may be using the port.", "Port check failed" );
            } finally {
                if ( listener != null ) {
                    listener.Stop();
                }
                Enabled = true;
                bPortCheck.Text = "Check";
            }
        }