Foreach (string thumb in Directory.GetFiles(@"C:\Users\simog1\Desktop\Portfolio-Leg\portfolio","*.png",SearchOption.AllDirectories))
        {
            string LargePic = thumb.Replace("t.png", ".jpg");

            litGallery.Text += "<li>"
                            + "<a href=\"" + LargePic + "\" rel=\"lightbox[portret]\"border=\"0\">"
                            + "<img src=\"" + thumb + "\" width=\"136\" height=\"119\" border=\"0\">"
                            + "</a> </li>";

        }