Tomasz Janczuk of the Silverlight Web Services team joins John to demonstrate how to implement duplex communication with WCF in Silverlight. Tomasz  demonstrates a how to implement a chat application using WCF, the basics of the polling duplex protocol, when the Net.tcp protocol is ideal, and some performance and scalability considerations.

Relevant links:

Follow us on Twitter @SilverlightTV or on the web at



Key links for Silverlight TV


Watch Silverlight TV Shows on Channel 9

Watch shows and catch the latest news in our Silverlight TV blog



Subscribe to the RSS feed for the show itself

Subscribe to the show on your Zune

Subscribe to the show for your iPod


Follow @SilverlightTV on Twitter for updates, alerts for new shows, and to submit comments and feedback.

If you have not watched the previous episodes of Silverlight TV, you can catch them here.