Why ChannelFactory-based client application cannot use event-driven asynchronous calling model

Question

I found in MSDN that ChannelFactory-based client cannot use event-driven asynchronous calling model, but a ServiceModel.ClientBase-based client can

How is this justified? What are the reasons for it? Here is the MSDN link http://msdn.microsoft.com/en-us/library/ms731177.

Answer 1

ClientBase is a wrapper around ChannelFactory. ClientBase was intended to work with svcutil.exe to enable direct support via the /async flag for both event-based and callback/delegate-based asynchronous methods.

The ChannelFactory itself has no knowledge of the Begin/End pattern, so you need to use ClientBase to achieve the built-in async-awareness or create it yourself with ChannelFactory.