WCF Receive-Request Communication In C# Aplication

I want to use WCF for server to client communication. Start clinet which will s开发者_如何学Cend message to server , ones server receive message its display that message in from of MessageBox Confirmation For Asked Question. So reply will be Yes/No which sent back to client.

As per result of Yes/No clinet will process ahed ...

How can I achieve above thing in C#.net?

I have read many articles about callback but did not get much idea for implementation.

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This tutorial walks through creating the client & service. The difference is, instead of implementing a calculator, you'll want to implement your code for whatever the service does.

One question, though, why do you want the service to display a yes/no and not the client?

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FWIW, I once wrote a series of blog posts that describe how to approach development of Duplex WCF services with Test-Driven Development.