this control can be used in layout.master to load an extra css file you can specify roles for whom the extra css link will be rendered if left blank then it will always render provided that either CssFileName or CssFullUrl are specified requested here: https://www.mojoportal.com/Forums/Thread.aspx?pageid=5&t=12248~1#post50892 Example usage:
where admin.css is an extra file in the skin folder that is not combined in the main css 