Create a out of browser silverlight application

This application must work out of browser under Windows The application will be able to : 1) Download a file from a server (in HTTP), in order to get the URI of this file, the application must have an editbox to get it. 2) UI must include 3 buttons, one for "Start (if download not started, initial state) / Pause (If download started) / Resume (when in Pause)", and one for Stop. 3) During download, a progress bar will be update (So you have to include one in UI of the application) 4) If the application is closed, download can be resume when application is re-launched. It's a very basic application, need for a POC.