I am using Visual Studio 2010 to build my Silverlight app and upon compiling and running project, the app loads fine but my base maps never appear. If I copy the contents of the compiled web folder to our IIS server, the app loads and the base maps appear. Copying the web folder contents works every time but it's very time consuming. Where do I place the clientaccesspolicy.xml so I can preview my app in Visual Studio without copying the project to our IIS server?