In-depth analysis of Workflow Foundation's workflow activities

What is activity?
Minimum unit of a Workflow
Customizable
It can be a simple action or a combination of activities.
Ordered and event-driven
Predefined activities can be:
Control Process
Control conditions
Event handling
Management Status
Communicate with the outside world through web service or other means

Activity running environment
Activityexecutioncontext (AEC)
When the host calls the start method, each activity is created
Executeactivity
Cancelactivity
Closeactivity
Only the running status can be controlled. other statuses are controlled by workflow.
Status Model
Initialized, executing, canceling, closed, faulting, compensating

Data and Metadata
Meta Properties
Instance Properties

Predefined activities