title: Prevent Silverlight xap from being cached by proxy server
body: <p>The company I work for has proxies/WAN accelerators between our international sites to cache Intranet web content.  I have a Silverlight application being hosted on a server at one location, but being accessed by clients in another location.  When the users access the web page hosting the Silverlight app, they get the stale xap file being cached by the proxy and not the latest version from the server.  Local users always get the latest xap as their requests are not going through a proxy.</p>
  
  <p>I've tried the various header/metadata techniques mentioned elsewhere to prevent caching, and the containing web page itself is being served up fresh, but I still get the old .xap file.  Short of getting our IT admin to disable proxy caching for my site, is there anything I can do make sure the latest xap file get retrieved from the server instead of the proxy?  The containing page is ASP.NET.</p>