public void ProcessRequest(HttpContext context)
        {
            var request = context.Request;
            var text    = request.Params.Get("text");

            text = (text == null) ? String.Empty : text;

            context.Response.ContentType = "image/png";

            var image = ImageFactory.CreateBitmapImage(text);

            image.Save(context.Response.OutputStream, ImageFormat.Png);
        }