The .NET component library bbv.Common (open source – Apache License 2.0) provides a powerful hierarchical state machine.

Its features are:

• value type based (enums, ints, …) resulting in single class state machines.
• actions
  • on transitions
  • entry and exit actions (parametrizable)
• transaction guards
• hierarchical
  • different history behaviours to initialize state always to same state or last active state
• fluent definition interface
• synchronous/asynchronous state machine
  • passive state machine handles state transitions synchronuously
  • active state machine handles state transitions asynchronously on the worker thread of the state machine
• configurable thorough logging simplifies debugging using log4net (can be replaced easily with custom logging)
• state machine report for textual description of state machine

.NET, Software .NET, bbv.Common, state machine