public class UtilityController : Controller
    {
        //
        // GET: /Utility/
        public ContentResult SvgBuilder(string stops)
        {
            string[] values = stops.Split(new Char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);

            var sb = new StringBuilder();
            sb.Append("<svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\" width=\"100%\" height=\"100%\">");
            sb.AppendLine();
            sb.Append("<defs>");
            sb.AppendLine();
            sb.Append("<linearGradient id=\"linear-gradient\" x1=\"0%\" y1=\"0%\" x2=\"0%\" y2=\"100%\">");
            sb.AppendLine();

            foreach (var val in values)
            {
                string[] items = val.Split(new Char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
                sb.Append("<stop offset=\"" + items[1] + "\" stop-color=\"" + items[0] + "\" stop-opacity=\"1\"/>");
                sb.AppendLine();
            }

            sb.Append("</linearGradient>");
            sb.AppendLine();
            sb.Append("</defs>");
            sb.AppendLine();
            sb.Append("<rect width=\"100%\" height=\"100%\" fill=\"url(#linear-gradient)\"/>");
            sb.AppendLine();
            sb.Append("</svg>");
            sb.AppendLine();

            return Content(sb.ToString(), "image/svg+xml");
        }
    }