Having around 10 stylesheets files in the theme, but only about 2 or 3 (a basic stylesheet plus one or two additional style setting) used on one aspx page. How can I avoid the theme loading all the stylesheet files?

Thanks

I see two ways to address this:

1) Remove them at runtime. Access Page.Header and remove all the child controls that are HtmlLink that you don't want.

2) Add them at runtime. Don't put them in the Themes directory, and instead add them as needed by creating HtmlLink controls and adding them  Page.Header.

-Brock

Thanks for your information. I have to say that the theme is still a junior feature.

It sounds like you have a fairly complicated site with multiple stylesheets
per page and you have broken out the various css classnames into these
stylesheets. The basic stylesheet probably does not change much (even if
you were to apply a different theme to your site) so include this stylesheet
as a regular link tag in your base master page. Then create different
themes for each of the different pages that require a different set of
stylesheets. For instance the themes might be named BlueThemePageType1 and
BlueThemePageType2. In the basepage for PageType1 or PageType2 set the
appropriate theme in the PreInit event and you are done.

Themes and masterpages plus good old html all working together can provide a
very dynamic and powerful system for you.