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Introit - call it whatever, but today I’m recycling an old post. And I have one more little confession. When I started writing a new rehosted app today, I found out my old toolbox FAQ was fairly useless. It was even getting to the point where someone had to post this in the forum : “I found a number...

There's not a lot of guidance out there on how to secure your Workflow Services using AD FS, nor that give you some cool ideas of how to leverage the two together (including how to leverage multiple attribute stores). Check...

If you are curious as to how to run WF 4 in Azure (Web and Worker Roles and hybrid scenarios), check out this article over at the AppFabric CAT's blog, and while you're there drop some feedback: Running .NET 4...

Can Azure worker roles host a service at the root? http://app.cloudapp.net:5555 ? Or do you need something hanging off it: http://app.cloudapp.net:5555/Service1 ? A: You can host directly at the root. Why is there guidance that says the security mode has...

If you're interested in the problem space of building hybrid solutions that leverage both Azure AppFabric and Windows Server AppFabric, go check out this really awesome blog entry I was honored to help author: Hybrid Cloud Solutions With Windows Azure...

If you're interested in building a custom, stand-alone application for designing Workflows and Workflow Services with .NET 4.0, you should check out the reference application we built that is now available from the MSDN Code Gallery. It's a feature rich...

Simple Merge Pattern The Simple Merge Pattern represents the case where two or more branches come together to execute a single, shared branch of common logic following independent branches. The key to the simple merge is the lack of synchronization...

Implementation Using State Machine The State Machine's Transitions define a very natural way to implement the Simple Merge Pattern, because multiple states can transition back into a single state. The figure below shows the payment processing scenario, which evaluates the...

Implementation Using FlowDecision & FlowSwitch Within a FlowChart, the FlowDecision and FlowSwitch activities can each be used to implement the Simple Merge Pattern. FlowDecision The FlowDecision enables a binary Exclusive choice between to branches by having an output branch for...

Implementation using Parallel & ParallelForEach The Parallel and ParallelForEach activities can be used to implement the Simple Merge Pattern by configuring the Completion Condition such that it evaluates to True whenever the first child branch completes. Parallel The following example...