Summary: All places during the execution of a WorkflowInstance where a WorkflowState is persisted to the WorkflowPersistenceService. It is often beneficial for a WorkflowInstance state to be saved to disk. Not only when a workflow is long running is this required but also to ensure consistency when performing transactions. When is Workflow persisted: * Before the WorkflowInstance is completed. * Before the WorkflowInstance is terminated. * When the WorkflowInstance [Unload] or TryUnload functions are called. * When the WorkflowInstance goes idle and the UnloadOnIdle property if the WorkflowPersistenceService is set. * After the execution of an [Activity] adorned with the PersistOnCloseAttribute. When one of these PersistencePoints is reached the WorkflowRuntime will call the WorkflowPersistenceService SaveWorkflowInstanceState function to persist the workflow.
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