public void Start()
        {
            _socket = CreateSocketBindAndListen(AddressFamily.InterNetwork, _ipAddress, _port);

            //start the timer
            //DecrementRequestCount();

            ThreadPool.QueueUserWorkItem(delegate
                {
                    while (!_shutdownInProgress)
                    {
                        try
                        {
                            Socket acceptedSocket = _socket.Accept();

                            ThreadPool.QueueUserWorkItem(delegate
                                {
                                    if (!_shutdownInProgress)
                                    {
                                        Connection conn = new Connection(this, acceptedSocket);

                                        if (conn.WaitForRequestBytes() == 0)
                                        {
                                            conn.WriteErrorAndClose(400);
                                            return;
                                        }

                                        Host host = GetHost();

                                        if (host == null)
                                        {
                                            conn.WriteErrorAndClose(500);
                                            return;
                                        }

                                        //IncrementRequestCount();
                                        host.ProcessRequest(conn);
                                    }
                                });
                        }
                        catch
                        {
                            Thread.Sleep(100);
                        }
                    }
                });
        }

　　　　 /// <remarks>
        /// This is Dmitry's hack to enable running outside of GAC.
        /// There are some errors being thrown when running in proc
        /// </remarks>
        private object CreateWorkerAppDomainWithHost(string virtualPath, string physicalPath, Type hostType,int port)
        {


            // create BuildManagerHost in the worker app domain
            //ApplicationManager appManager = ApplicationManager.GetApplicationManager();
            Type buildManagerHostType = typeof(HttpRuntime).Assembly.GetType("System.Web.Compilation.BuildManagerHost");
            IRegisteredObject buildManagerHost = ApplicationManager.CreateObject(_appId, buildManagerHostType, virtualPath,
                                                                          physicalPath, false);

            // call BuildManagerHost.RegisterAssembly to make Host type loadable in the worker app domain
            buildManagerHostType.InvokeMember("RegisterAssembly",
                                              BindingFlags.Instance | BindingFlags.InvokeMethod | BindingFlags.NonPublic,
                                              null,
                                              buildManagerHost,
                                              new object[] { hostType.Assembly.FullName, hostType.Assembly.Location });

            // create Host in the worker app domain
            // FIXME: getting FileLoadException Could not load file or assembly 'WebDev.WebServer20, Version=4.0.1.6, Culture=neutral, PublicKeyToken=f7f6e0b4240c7c27' or one of its dependencies. Failed to grant permission to execute. (Exception from HRESULT: 0x80131418)
            // when running dnoa 3.4 samples - webdev is registering trust somewhere that we are not
            return ApplicationManager.CreateObject(_appId, hostType, virtualPath, physicalPath, false);
        }

HttpRuntime.ProcessRequest(this);