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How do you cancel work in your application? Many middle tier components and services rely on transactions to handle cancellation for them. This makes a great deal of sense because transactional programming is well understood. However there are many times when you must cancel work that cannot be done under a transaction. Cancellation can be very difficult because you have to track work that has been done to know how to cancel it. WF4 also includes compensation activities that can be used to do clean up work as well.
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Keith Pijanowski's Blog: In that post I described Software as a Service, Platform as a Service and I concluded with a description of Software plus Services which is Microsoft’s marketing pitch on their PaaS and SaaS offerings.
