This API supports the .NET Framework infrastructure and is not intended to be used directly from your code.
Occurs when the handler is selected to respond to the request.
Assembly: System.Web (in System.Web.dll)
The event is used by the ASP.NET infrastructure to determine the request handler for the current request. For more information, see How to: Register HTTP Handlers.
For more information about how to handle events, see Consuming Events.
is introduced in the .NET Framework version 3.5. For more information, see .NET Framework Versions and Dependencies.