Adding CSS Links On The Fly In C#

Here is an example of adding a link to a CSS dynamically on an ASP.Net page. I stole this from somewhere, but forgot where, so please forgive the lack of attribution.

  void AddSmallGridCSS ()
    {
      HtmlLink link = new HtmlLink ();
      link.Href = "~/App_Themes/" + Page.Theme + "/mystylesheet.css";
      link.Attributes.Add ( "type", "text/css" );
      link.Attributes.Add ( "rel", "stylesheet" );
      Page.Header.Controls.Add ( link );

    }

You don't have to use app themes, the file can be in any directory.