ASP.NET(Include Active Class For Page In CSS)

public void activePage()

    {

        //Copyrights...

        copyrightyear.InnerText = DateTime.Now.ToString("yyyy");

        #region ActivePage

        string k = HttpContext.Current.Request.Url.AbsolutePath.ToString();

        string t = k.Substring(k.LastIndexOf("/") + 1, (k.LastIndexOf(".aspx") - 1) - k.LastIndexOf("/")).ToLower();

        switch (t)

        {

            case "default": //pagename

                homepage.Attributes.Add("class", "active");

                break;

            case "exclusiveoffers"://pagename

                exclusiveoffers.Attributes.Add("class", "active");

                break;

            case "blog"://pagename

                blog.Attributes.Add("class", "active");

                break;

            case "aboutus"://pagename

                aboutus.Attributes.Add("class", "active");

                break;

            case "contactus"://pagename

                contactus.Attributes.Add("class", "active");

                break;

        }

        #endregion

    }