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Communicating with WCF Services Using SendActivity

To complete this example, let’s examine how a workflow-enabled application can communicate

with WCF services. The .NET 3.5–centric SendActivity and ReceiveActivity types allow you to build

workflow-enabled applications that communicate with WCF services. As the name implies, the

SendActivity type can be used to make calls on WCF service operations, while ReceiveActivity

provides a way for the WCF service to make calls back on the WF (in the case of a duplex calling

contract). 

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