In CSF 2.5 the Session.config setting ParticipantConfiguration/Pr... is used to specify the directory for the WSDL cache used by CSF when Sessions are created. If you're a developer intent on implementing a particular service contract, forgetting about this cache might cost you a couple of hours of frustration. Let's say I build a service at http://MyMachine/MyVdir/sl.... implementing SOAP action MyAction. I then try to create a Session in which the service is a participant, but...