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I have a service which calls back the client.
the interface has this attribute :
[ServiceContract(Namespace = "rf.services", CallbackContract = typeof (ISendBAck), SessionMode = SessionMode.Required)]
Does the SessionMode field is mandatory ?
why do i need it here ?
If i remove it , it still works. but this is a downloaded working example. and i wanted to know why it is there from the first place.
In a situation where oneway oneway operations and callbacks are used, the processing of messages may be queued. The use of sessions is not mandatory but provides assurance that messages will be processed in the order they are received.
This assurances simply has a greater value to the client in scenarios where the call to the service might return before processing is completed.