Raises the Unload event.
Assembly: System.Web (in System.Web.dll)
ASP.NET calls this method to raise the Unload event. If you are developing a custom control, you can override this method in order to provide additional processing. If you override this method, call the base control's method to notify subscribers to the event.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.