Ever had a scenario in which two Silverlight applications have to communicate with each other. If you had, then there are some options to use like either a service or a message queue to do that task. But things have been simple now, with the advent of LocalMessageSender class. It is present in the namespace System.Windows.Messaging
For the sample code please visit my blog :
http://geekythoughts.net/
Njoy coding and please note that this feature is available only after Silverlight 3.