Called by a composite activity to schedule the cancellation of a child activity. The workflow runtime disallows cancellation of a child activity that is not in the Executing state.
Assembly: System.Workflow.ComponentModel (in System.Workflow.ComponentModel.dll)
activity is null.
activity is not a valid child of the ActivityExecutionContext. This means that either the argument is equal to the associated Activity or that the argument is not in the commented state and is a child of the Activity associated with this ActivityExecutionContext.
The ActivityExecutionContext has been disposed.
activity is not in the Executing state.