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Help me to create a WCF service with Request-Response basis means in Duplex mode

Something like this?

How to: Create a Duplex Contract[^]
Tanumay99 15-Nov-13 6:12am
Thanks for help.
But the example CalculatorDuplex is named Duplex. But it is not work on duplex mode.
Because there all the service are set as
So how it work as duplex mode?
Nicholas Marty 15-Nov-13 6:19am
"IsOneWay=true" is not related to Duplex. It just says that the Operation doesn't return a response. You can remove it and return e.g. an integer or something like that if you like.
Take a look at the "ICalculatorDuplexCallback" usage this is how the Server -> Client calls are made

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