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Pro C# 2010 and the .NET 4 Platform, Fifth Edition by Andrew Troelsen

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26.3. The WF 4.0 Runtime

The next thing to understand is that the WF API also consists of a runtime engine to load, execute, unload, and in other ways manipulate a workflow which you have defined. The WF runtime engine can be hosted within any .NET application domain; however, be aware that a single application domain can only have one running instance of the WF engine.

Recall from Chapter 16 that an AppDomain is a partition within a Windows process that plays host to a .NET application and any external code libraries. As such, the WF engine can be embedded within a simple console program, a GUI desktop application (Windows Forms or WPF), or exposed from a Windows Communication Foundation (WCF) service.

NOTE

The WCF Workflow Service Application ...

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