Assembly: System.Web (in system.web.dll)
The ApplicationManager object provides lifetime management of objects in the hosting environment for an ASP.NET application. It is responsible for:
Activating and initializing ASP.NET applications.
Managing the application lifetime and the lifetime of objects registered in the application.
Exposing objects used by the hosting environment to process ASP.NET application requests.
Providing a list of applications running in the hosting process at any given moment.