WCF service interface exchange

I want to avoid the duplex Chanel in WCF and create callback service on client,开发者_StackOverflow社区 pass the client address to server so the server can call the client any time. (maybe different binding etc.)

How can I pass the callback interface to the client? (I still want the server to manage this interface and to avoid put it in seperate DLL. Any Ideas? Thanks

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Such interface can be passed only in shared assembly.