Why is it that when my Silverlight project is built, the output directory contains a bunch of culture specific directories:

* ar\System.Windows.Controls.resources.dll
* bg\System.Windows.Controls.resources.dll
* ca\System.Windows.Controls.resources.dll
* etc etc etc

Also the root of the build output contains:

* System.Xml.Linq.dll
* System.windows.Controls.dll

I have gone through the projects in my solution and made sure that "Copy Local" is set to false for all the referances of the mentioned dll files. 
Those 2 files were set to true, but I did switch them to false. Despite my effort to google an answer, I remain stuck.