I am migrating an ASP.NET Web Service toward WCF. The old Web Service endpoint had a nice extensive description page generated from the comment of the underlying class exposed as a service endpoint. In particular, all available web methods were listed.
Is there a way to emulate somehow this behavior with WCF? At least, how can I customize the HTML content of the WCF endpoint?
As far as I know, no, there's no way to change that right now.
From what I've heard and read, there will be a customizable "help page" mechanism in WCF 4 - but as far as I know, only for REST-based services (which don't have the help of a WSDL/XSD).
Check this out: WCF Web Programming Help Page
For the SOAP based services: you can always define your own custom URL where you drop your WSDL/XSD that should be retrieved by clients, but that's just that - a WSDL that describes your service. You can of course add WSDL comments to your document to explain a bit, but it's still quite limited.
I don't think there's any "out-of-the-box" provision in WCF to support manipulating / customizing the actual service page that gets rendered back to the client. Or if there is: I'd love to know about it!