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28-4-2008 10:21:3419-10-2006 12:06:0419-10-2006 12:05:5619-10-2006 11:30:48

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Composite Activity
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Summary
Derivative of Activity that is the base class for all activities that contain other activities. A Composite Activity is responsible for managing the execution of its child activities.

A CompositeActivity manages the execution of its child activities using ActivityExecutionContext class methods and events defined on the Activity class. For example, a child activity is scheduled for execution using the ExecuteActivity of ActivityExecutionContext. A CompositeActivity activity can be notified when a child activity completes its execution by subscribing to the Closed event defined on Activity.

The workflow runtime enforces certain constraints on CompositeActivity execution, the most fundamental of which is that a CompositeActivity activity cannot move to the Closed state if any child activities are still in a Executing, Canceling, Compensating, or Faulting, state.

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