SilverTicTacToe was originally created using Visual Studio "Orcas" beta 1, Silverlight 1.1 Alpha, the Silverlight Tools Alpha and Expression Blend 2 May Preview. Later it was updated to 1.1 refresh, and then to version 2.0 Beta 1 and 2 and finally the release version of Silverlight 2.

To play SilverTicTacToe online you need the Silverlight 2.0 plugin or a higher compatible version.

If you wish, you can even download the sourcecode here.

Just as a disclaimer, this code was created using the Alpha version of Silverlight 1.1. As Silverlight and my understanding of Silverlight development progressed, I would not consider the code as best-practice. Just so that you know ;-)