Among the new features introduced with Silverlight 3.0, Out-of-Browser is certainly one that has aroused more interest among developers as it opens very interesting usage scenarios that go beyond the traditional Web application, with version 4.0 this feature has been enhanced with additional options that makes it a viable alternative to classic desktop applications.
Introduction
Out-of-Browser mode allows a Silverlight 3.0 or above application to be detached from its natural host (the browser) and be run by the final user as any desktop application.