I've expected that Observable.using flow is:

• create resource
• creates resource using observable, subscribe
• finish/cancel resource-using observable
• dispose resource

But for me actual is sometimes

• create resource
• creates resource using observable, subscribe
• dispose resource
• finish/cancel resource-using observable

As I understand, using 'eager' makes second flow consistent,but i need first behavior, which is not observed on dispose() call - resource is disposed first always, then observable. What is correct way to make Observable which is not eager even on dispose?