Building WCF services declaratively in XAML lets you integrate services with workflows and provides flexibility that identical services implemented in code cannot.
by Thiru Thangarathinam
July 23, 2009
lmost any application requires some sort of workflow, where the application performs one or more actions through processes made up of multiple activities. Windows Workflow Foundation (WF) lets developers create these workflows using a rich set of activities that are very easy to use. Within the WF activities that make up a workflow, you may sometimes need to invoke an external WCF service, sending and receiving appropriate messages.
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lmost any application requires some sort of workflow, where the application performs one or more actions through processes made up of multiple activities. Windows Workflow Foundation (WF) lets developers create these workflows using a rich set of activities that are very easy to use. Within the WF activities that make up a workflow, you may sometimes need to invoke an external WCF service, sending and receiving appropriate messages. 
