用于解析HTML的.NET库：AngleSharp
AngleSharp是一个.NET库，让你能够解析基于尖括号的超文本如：HTML, SVG, 和MathML。AngleSharp的一个重要方面是，CSS也可以解析。该解析器构建建立在官方W3C规范之上。
var source = @" <!DOCTYPE html> <html lang=en> <meta charset=utf-8> <meta name=viewport content=""initial-scale=1, minimum-scale=1, width=device-width""> <title>Error 404 (Not Found)!!1</title> <style> *{margin:0;padding:0}html,code{font:15px/22px arial,sans-serif}html{background:#fff;color:#222;padding:15px}body{margin:7% auto 0;max-width:390px;min-height:180px;padding:30px 0 15px}* > body{background:url(//www.google.com/images/errors/robot.png) 100% 5px no-repeat;padding-right:205px}p{margin:11px 0 22px;overflow:hidden}ins{color:#777;text-decoration:none}a img{border:0}@media screen and (max-width:772px){body{background:none;margin-top:0;max-width:none;padding-right:0}}#logo{background:url(//www.google.com/images/errors/logo_sm_2.png) no-repeat}@media only screen and (min-resolution:192dpi){#logo{background:url(//www.google.com/images/errors/logo_sm_2_hr.png) no-repeat 0% 0%/100% 100%;-moz-border-image:url(//www.google.com/images/errors/logo_sm_2_hr.png) 0}}@media only screen and (-webkit-min-device-pixel-ratio:2){#logo{background:url(//www.google.com/images/errors/logo_sm_2_hr.png) no-repeat;-webkit-background-size:100% 100%}}#logo{display:inline-block;height:55px;width:150px} </style> <a href=//www.google.com/><span id=logo aria-label=Google></span></a> <p><b>404.</b> <ins>That’s an error.</ins> <p>The requested URL <code>/error</code> was not found on this server. <ins>That’s all we know.</ins>"; //Just get the DOM representation var doc = DocumentBuilder.Html(source); //Serialize it back to the console Console.WriteLine(doc.DocumentElement.OuterHtml);
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