“É”变为“¡”C＃编码从UTF-8到ISO-8859-1

Question

我在使用UTF-8时将ISO-8859-1转换为htmlagilitypack时遇到问题

string url = "http://www.example.com";
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
HtmlDocument htmldocument = new HtmlDocument();
htmldocument.Load(response.GetResponseStream(), Encoding.UTF8);

HtmlNode headnode = htmldocument.DocumentNode.SelectSingleNode("//head");
HtmlNode titlenode = headnode.SelectSingleNode(".//title");
string title = titlenode.InnerText;

标题输出为Nice Café

这就是我尝试编码的方式

Encoding iso = Encoding.GetEncoding("ISO-8859-1");
Encoding utf8 = Encoding.UTF8;
byte[] utfBytes = utf8.GetBytes(title);
byte[] isoBytes = Encoding.Convert(utf8, iso, utfBytes);
string Fixedtitle = iso.GetString(isoBytes);

固定标题输出应为Nice Café

我认为问题是当iso-8859-1被错误地强制进入UTF-8时。但我无法修复输出文本。

请帮帮我。最好的问候。