WPF / WCF Push Notification

Question

Does .NET 3.5 (WCF, or other) offer any type of push notification service?

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I have a server and a client. I want a service to run on the server and if x happens then push a notification to the client. I don't want to pull the server every x minutes to gather the information.

Answer 1

Your question couldn't be any more general, but I'm going to take a guess and suggest you look at WCF callbacks.

I doubt your question relates to WPF or even WF, but you will need to elaborate if you think otherwise.