Assembly: System.Web (in System.Web.dll)
The is called when the instance of an object that was created to perform a data operation is discarded. The Dispose method is called, only if the type that is identified by the TypeName property implements the IDisposable interface.
Raising an event invokes the event handler through a delegate. For more information, see Consuming Events.
The method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.Notes to Inheritors
When overriding the method in a derived class, be sure to call the method for the base class so that registered delegates receive the event.