C# WCF can't catch by MessageInspector the ?wsdl

Question

I try to catch all message send to my WCF public service.

I use WCF service extension and actually all end point are under control.

But when I try to get the wsdl like this :

http://localhost/MyProject.MyPublicService/Service/PublicService.svc?singlewsdl

or

http://localhost/MyProject.MyPublicService/Service/PublicService.svc?wsdl

I don't trigger AfterReceiveRequest... and this annoying me a lot.

Does someone know how to enter into AfterReceiveRequest when triggering the ?wsdl?

I created a class inherited from IServiceBehavior and Attribute Decorate the public service with the attribute.

Loop across all the channelDispatcher and for all endpoint for adding a MessageInspector.

My own opinion is what endpoint don't catch the request of the ?wsdl...

But I really don't know how to do that...

If somebody have a clue I really appreciate.

David