Configure specific controls so they opt out of the theming process entirely. : Themes « Development « ASP.NET Tutorial






Set the EnableTheming property of the control on the web page to false. 
ASP.NET will still apply the theme to other controls on the page, but it will skip over the control youve configured.

<asp:Button ID="Button1" runat="server" ... EnableTheming="false" />








9.42.Themes
9.42.1.An ASP.NET Theme enables you to apply a consistent style to the pages.
9.42.2.How Themes Work
9.42.3.Adding Skins to Themes
9.42.4.Creating Named Skins with a SkinID property
9.42.5.Themes Versus StyleSheetThemes
9.42.6.Override Skin properties by applying a Theme to a page with the StyleSheetTheme attribute instead of the Theme attribute.
9.42.7.Disabling Themes
9.42.8.Adding Cascading Style Sheets to Themes
9.42.9.Handling Theme Conflicts
9.42.10.Configure specific controls so they opt out of the theming process entirely.
9.42.11.Share the Theme among multiple web applications running on the same web server
9.42.12.Applying Themes Dynamically
9.42.13.Applying Skins Dynamically
9.42.14.Show Dynamic CSS