I understand that I can create "global themes" by placing the theme folders
in %WINDOWS%\Microsoft.NET\Framework\[version]\ASP.NETClientFiles\Themes ...
but my concern is that themes placed there would automatically be *applied*
and not simply *available* to the sites on the server.
Thanks!
Global themes are not "automatically applied" unless the pages section
of the machine.config file has the setting "theme=..."
If that is not the case then global themes can be referenced at site
level in the pages section of web.config or at page level in the
@pages directive.