Dynamically add CSS file to ASP.Net page

Programmatically include CSS file to ASP.Net page is considerable simple. Add follow code to your page initialization event. Next time when page was loaded, reference to your css file will be added at runtime.

 
    protected void Page_Init(object sender, EventArgs e)
    {
        HtmlLink css = new HtmlLink();
        css.Href = "css/fancyforms.css";
        css.Attributes["rel"] = "stylesheet";
        css.Attributes["type"] = "text/css";
        css.Attributes["media"] = "all";
        Page.Header.Controls.Add(css);
    }