protected void Reload()
        {
            if (_port_map_listener != null)
            {
                foreach (var l in _port_map_listener)
                {
                    l.Stop();
                }
                _port_map_listener = null;
            }
            // some logic in configuration updated the config when saving, we need to read it again
            _config = MergeGetConfiguration(_config);
            _config.FlushPortMapCache();
            Logging.save_to_file = _config.logEnable;
            Logging.OpenLogFile();
            ReloadIPRange();

            var hostMap = new HostMap();

            hostMap.LoadHostFile();
            HostMap.Instance().Clear(hostMap);

            if (privoxyRunner == null)
            {
                privoxyRunner = new HttpProxyRunner();
            }
            if (_pacServer == null)
            {
                _pacServer = new PACServer();
                _pacServer.PACFileChanged      += pacServer_PACFileChanged;
                _pacServer.UserRuleFileChanged += pacServer_UserRuleFileChanged;
            }
            _pacServer.UpdateConfiguration(_config);
            if (gfwListUpdater == null)
            {
                gfwListUpdater = new GFWListUpdater();
                gfwListUpdater.UpdateCompleted += pacServer_PACUpdateCompleted;
                gfwListUpdater.Error           += pacServer_PACUpdateError;
            }
            if (chnDomainsAndIPUpdater == null)
            {
                chnDomainsAndIPUpdater = new ChnDomainsAndIPUpdater();
                chnDomainsAndIPUpdater.UpdateCompleted += pacServer_PACUpdateCompleted;
                chnDomainsAndIPUpdater.Error           += pacServer_PACUpdateError;
            }

            _listener?.Stop();

            // don't put PrivoxyRunner.Start() before pacServer.Stop()
            // or bind will fail when switching bind address from 0.0.0.0 to 127.0.0.1
            // though UseShellExecute is set to true now
            // http://stackoverflow.com/questions/10235093/socket-doesnt-close-after-application-exits-if-a-launched-process-is-open
            try
            {
                privoxyRunner.Stop();
                privoxyRunner.Start(_config);

                var local    = new Local(_config, _transfer, _rangeSet);
                var services = new List <Listener.Service>
                {
                    local,
                    _pacServer,
                    new APIServer(this, _config),
                    new HttpPortForwarder(privoxyRunner.RunningPort, _config)
                };
                _listener = new Listener(services);
                _listener.Start(_config, 0);
            }
            catch (Exception e)
            {
                // translate Microsoft language into human language
                // i.e. An attempt was made to access a socket in a way forbidden by its access permissions => Port already in use
                if (e is SocketException se)
                {
                    if (se.SocketErrorCode == SocketError.AddressAlreadyInUse)
                    {
                        e = new Exception(string.Format(I18N.GetString("Port {0} already in use"), _config.localPort),
                                          se);
                    }
                    else if (se.SocketErrorCode == SocketError.AccessDenied)
                    {
                        e = new Exception(string.Format(I18N.GetString("Port {0} is reserved by system"), _config.localPort), se);
                    }
                }

                Logging.LogUsefulException(e);
                ReportError(e);
            }

            _port_map_listener = new List <Listener>();
            foreach (var pair in _config.GetPortMapCache())
            {
                try
                {
                    var local    = new Local(_config, _transfer, _rangeSet);
                    var services = new List <Listener.Service> {
                        local
                    };
                    var listener = new Listener(services);
                    listener.Start(_config, pair.Key);
                    _port_map_listener.Add(listener);
                }
                catch (Exception e)
                {
                    // translate Microsoft language into human language
                    // i.e. An attempt was made to access a socket in a way forbidden by its access permissions => Port already in use
                    if (e is SocketException se)
                    {
                        if (se.SocketErrorCode == SocketError.AddressAlreadyInUse)
                        {
                            e = new Exception(string.Format(I18N.GetString("Port {0} already in use"), pair.Key), e);
                        }
                        else if (se.SocketErrorCode == SocketError.AccessDenied)
                        {
                            e = new Exception(string.Format(I18N.GetString("Port {0} is reserved by system"), pair.Key), se);
                        }
                    }
                    Logging.LogUsefulException(e);
                    ReportError(e);
                }
            }

            ConfigChanged?.Invoke(this, new EventArgs());

            UpdateSystemProxy();
            Utils.ReleaseMemory();
        }
        protected void Reload()
        {
            if (_port_map_listener != null)
            {
                foreach (Listener l in _port_map_listener)
                {
                    l.Stop();
                }
                _port_map_listener = null;
            }
            // some logic in configuration updated the config when saving, we need to read it again
            _config = MergeGetConfiguration(_config);
            _config.FlushPortMapCache();
            ReloadIPRange();

            HostMap hostMap = new HostMap();

            hostMap.LoadHostFile();
            HostMap.Instance().Clear(hostMap);

#if !_CONSOLE
            if (polipoRunner == null)
            {
                polipoRunner = new HttpProxyRunner();
            }
#endif
            if (_pacServer == null)
            {
                _pacServer = new PACServer();
                _pacServer.PACFileChanged += pacServer_PACFileChanged;
            }
            _pacServer.UpdateConfiguration(_config);
            if (gfwListUpdater == null)
            {
                gfwListUpdater = new GFWListUpdater();
                gfwListUpdater.UpdateCompleted += pacServer_PACUpdateCompleted;
                gfwListUpdater.Error           += pacServer_PACUpdateError;
            }

            // don't put polipoRunner.Start() before pacServer.Stop()
            // or bind will fail when switching bind address from 0.0.0.0 to 127.0.0.1
            // though UseShellExecute is set to true now
            // http://stackoverflow.com/questions/10235093/socket-doesnt-close-after-application-exits-if-a-launched-process-is-open
            bool _firstRun = firstRun;
            for (int i = 1; i <= 5; ++i)
            {
                _firstRun = false;
                try
                {
                    if (_listener != null && !_listener.isConfigChange(_config))
                    {
                        Local local = new Local(_config, _transfer, _rangeSet);
                        _listener.GetServices()[0] = local;
#if !_CONSOLE
                        if (polipoRunner.HasExited())
                        {
                            polipoRunner.Stop();
                            polipoRunner.Start(_config);

                            _listener.GetServices()[3] = new HttpPortForwarder(polipoRunner.RunningPort, _config);
                        }
#endif
                    }
                    else
                    {
                        if (_listener != null)
                        {
                            _listener.Stop();
                            _listener = null;
                        }

#if !_CONSOLE
                        polipoRunner.Stop();
                        polipoRunner.Start(_config);
#endif

                        Local local = new Local(_config, _transfer, _rangeSet);
                        List <Listener.Service> services = new List <Listener.Service>();
                        services.Add(local);
                        services.Add(_pacServer);
                        services.Add(new APIServer(this, _config));
#if !_CONSOLE
                        services.Add(new HttpPortForwarder(polipoRunner.RunningPort, _config));
#endif
                        _listener = new Listener(services);
                        _listener.Start(_config, 0);
                    }
                    break;
                }
                catch (Exception e)
                {
                    // translate Microsoft language into human language
                    // i.e. An attempt was made to access a socket in a way forbidden by its access permissions => Port already in use
                    if (e is SocketException)
                    {
                        SocketException se = (SocketException)e;
                        if (se.SocketErrorCode == SocketError.AccessDenied)
                        {
                            e = new Exception(I18N.GetString("Port already in use") + string.Format(" {0}", _config.localPort), e);
                        }
                    }
                    Logging.LogUsefulException(e);
                    if (!_firstRun)
                    {
                        ReportError(e);
                        break;
                    }
                    else
                    {
                        Thread.Sleep(1000 * i * i);
                    }
                    if (_listener != null)
                    {
                        _listener.Stop();
                        _listener = null;
                    }
                }
            }

            _port_map_listener = new List <Listener>();
            foreach (KeyValuePair <int, PortMapConfigCache> pair in _config.GetPortMapCache())
            {
                try
                {
                    Local local = new Local(_config, _transfer, _rangeSet);
                    List <Listener.Service> services = new List <Listener.Service>();
                    services.Add(local);
                    Listener listener = new Listener(services);
                    listener.Start(_config, pair.Key);
                    _port_map_listener.Add(listener);
                }
                catch (Exception e)
                {
                    // translate Microsoft language into human language
                    // i.e. An attempt was made to access a socket in a way forbidden by its access permissions => Port already in use
                    if (e is SocketException)
                    {
                        SocketException se = (SocketException)e;
                        if (se.SocketErrorCode == SocketError.AccessDenied)
                        {
                            e = new Exception(I18N.GetString("Port already in use") + string.Format(" {0}", pair.Key), e);
                        }
                    }
                    Logging.LogUsefulException(e);
                    ReportError(e);
                }
            }

            ConfigChanged?.Invoke(this, new EventArgs());

            UpdateSystemProxy();
            Util.Utils.ReleaseMemory(true);
        }