Adds the specified HttpApplication.MapRequestHandler event to the collection of asynchronous HttpApplication.MapRequestHandler event handlers for the current request.
- beginHandler
The System.Web.BeginEventHandler that starts asynchronous processing of the HttpApplication.MapRequestHandler.
- endHandler
The System.Web.EndEventHandler that ends asynchronous processing of the HttpApplication.MapRequestHandler.
- state
The associated state to add to the asynchronous HttpApplication.MapRequestHandler.