In Silverlight 3 and 4, it is possible to create a Silverlight application and to have the user install it on the desktop (aka Out Of the Browser OOB). This is a great way to offer a “light desktop” experience, where the application can be started from a shortcut on the desktop or the Start menu, but running on Silverlight so that you don’t need the full .NET framework, and can run it on PC and Mac as you like. You can even use the application when the PC is offline, which is not possible with an in-browser application. I am very excited about this feature, because I was one of the first to talk about how great such a feature would be to add a piece to the .NET continuum of client applications.
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