... architectures. In addition to managing business objects and processing the standard business logic, every interface method in the Façade validates the incoming arguments, authorizes the action for ... kept? Alternatives include: in the Cache, in Session, or in a globally accessible HashTable data structure. All three providers are implemented in Patterns in Action 2.0 using Microsoft’s Provider ... from within the Login dialog window (through a link label on the top right). Figure 3: Windows application (not logged in) When starting the web service client you see the main form with...