The name of the Application Styling Framework(tm) (ASF) style set which has been designed to give this control a consistent appearance with other controls in your application.
This property may return the empty string ("") to imply that the default style set (named "Default") should be used.
This property allows application developers to override the Application Styling style set that gets applied at the page-level, when their Web form contains a WebPageStyler control. This style set selection will override any style set name set in the application configuration (i.e., the "web.config" file) using the styleSetName attribute.
This style set name can be overridden by individual controls at the control-level.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2