Bloom.Publish.EpubMaker.FixIllegalIds C# (CSharp) Method

        private void FixIllegalIds(HtmlDom pageDom)
        {
            // Xpath results are things that have an id attribute, so MUST be XmlElements (though the signature
            // of SafeSelectNodes allows other XmlNode types).
            foreach (XmlElement elt in pageDom.RawDom.SafeSelectNodes("//*[@id]"))
            {
                var id = elt.Attributes["id"].Value;
                var first = id[0];
                if (first >= '0' && first <= '9')
                    elt.SetAttribute("id", "i" + id);
            }
        }