動態載入CSS

<link rel="stylesheet" type="text/css" href="xxx.css">
Page_Load: ControlHelper.AddStyleSheet(this.Page, "css/projectPage.css");
static public class ControlHelper
{
　static public void AddStyleSheet(Page page, string cssPath)
　{
　　HtmlLink link = new HtmlLink();
　　link.Href = cssPath;
　　link.Attributes["rel"] = "stylesheet";
　　link.Attributes["type"] = "text/css";
　　Page.Header.Controls.Add(link);
　}
}