public static void TrimWhitespace( this HtmlNode document) { var textNodes = document.SelectNodesAsList("//text()").Where( n => string.IsNullOrWhiteSpace(n.InnerHtml)); foreach (var textNode in textNodes) { textNode.Remove(); } var commentNodes = document.SelectNodesAsList("//comment()").Where( n => n.InnerHtml != "<!DOCTYPE html>"); foreach (var commentNode in commentNodes) { commentNode.Remove(); } }