Assembly: System.Web (in system.web.dll)
Use the InitiateShutdown method to stop a Web application domain and remove any objects registered with the RegisterObject method. This method returns immediately, before the shutdown is complete.
The Stop method is called on each registered object with the passed parameter set to false to allow each registered object to shut down asynchronously. After waiting for the amount of time specified in the shutdownTimeout attribute of the hostingEnvironment configuration element, the Stop method is called again with the passed parameter set to true for each registered object remaining.
Once all registered objects have finished shutting down, the HostingEnvironment objects shuts down the application domain.