input: [Category] Concurrency Management [Description] The download contains an interesting concept – a service that acts like a timer, calling back to its clients on requested intervals. The service actually uses the .NET timer and delegates, and is a nice demo of how to bridge the two technologies - the timer delegates and the WCF callbacks. In addition, it demonstrates WCF ability to marshal the callbacks correctly to the UI thread the client it running on. [Last Updated] 9/7/2006 [Title] 
output: Timer Service and UI callbacks