|Image via CrunchBase|
In Silverlight 5 it is possible to enable applications to run with elevated permissions in-browser.
The code snippet below will open Notepad.exe using the AutomationFactory in Silverlight. Using the AutomationFactory requires elevated permissions.
To run the snippet in Silverlight 4 the application must run with elevated permissions and in out-of-browser. In Silverlight 5 it is possible to run the snippet in-browser and with elevated permissions.
Silverlight 5 – Elevated Trust In-Browser « xamlgeek