protected void Page_Init(object sender, EventArgs e)
{
// Define an HtmlLink control.
HtmlLink myHtmlLink = new HtmlLink();
myHtmlLink.Href = "~/StyleSheet.css";
myHtmlLink.Attributes.Add("rel", "stylesheet");
myHtmlLink.Attributes.Add("type", "text/css");
// Add the HtmlLink to the Head section of the page.
Page.Header.Controls.Add(myHtmlLink);
}