You can download a simple Silverlight full screen-mode
sample I put together written in C# here.
When you run the sample it will load a super simple
Silverlight application within the browser and display a text message prompting
you to click it to switch into full-screen mode:
If you click the "Click for Full
Screen" text, the application will switch into full-screen mode -
which will hide everything else running on the system and take over the entire
When you switch into full-screen mode, Silverlight will
display a user message blurb that will pop-up on the screen for a few
seconds and instruct the user that they can press the escape key to switch back
into browser mode. After a few seconds this message will disappear and
only your content will be visible. In my sample above I also allow the
user to click on the "Click to Return to Browser" text and switch
back into browser mode as well.