How to pass Workflow service exception to client

I am using a WC开发者_C百科F Workflow service application (DeclarativeServiceLibrary). I have a Windows Forms client talking to the workflow service. I am able to handle known errors using TryCatch blocks. But in case the program meets any unknown exception and comes to the catch block, I want to return a Generic message to the client. Could anybody help me in achieving this?

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We have a sample that demonstrates this for WCF Services and WorkflowServices check it out.

• WCF / WF Service Fault and Validation Example

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If the exception is caught within the workflow, then you should use a SendReply activity that provides the fault exception. Your service contract also needs to define the fault contract otherwise the exception received on the client will fault the channel.