//how to use an external CSS within a ASP.Net content page!


using System.Web.UI.HtmlControls;   //add this for external CSS


  protected void Page_Load(object sender, EventArgs e)
    {

        lblError.Visible = false;

        //---connect to external CSS
        HtmlLink myCSS = new HtmlLink();
        myCSS.Attributes.Add("href", "~/SearchStyleSheet.css");
        myCSS.Attributes.Add("rel", "stylesheet");
        myCSS.Attributes.Add("type", "text/css");
        Header.Controls.Add(myCSS);

	}