blocks|key|3332633|text|您正在寻找的是一个文本模式的DOM渲染器，它可以输出文本，就像Lynx或其他文本browsers...This比您预期的要难得多。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3332634|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

What you are looking for is a text-mode DOM renderer that outputs text, much like Lynx or other Text browsers...This is much harder to do than you would expect.

blocks|key|3332656|text|最简单的方法可能是标签剥离，并用文本布局元素替换一些标签，如列表元素的破折号(li)和br和p的换行，将其扩展到表格应该不是太难。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3332657|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

The easiest would probably be tag stripping combined with replacement of some tags with text layout elements like dashes for list elements (li) and line breaks for br's and p's.
It shouldn't be too hard to extend this to tables.

blocks|key|345030|text|你有没有尝试过http://www.aaronsw.com/2002/html2text/，它是Python，但是开源的。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|345031|entityMap|0|LINK|mutability|MUTABLE|url|http://www.aaronsw.com/2002/html2text/^0|7|12|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Have you tried <a href="http://www.aaronsw.com/2002/html2text/" rel="nofollow noreferrer">http://www.aaronsw.com/2002/html2text/</a> it's Python, but open source.

blocks|key|3120220|text|我不知道C#，但是这里有一个非常小且易于阅读的html2txt脚本：http://www.aaronsw.com/2002/html2text/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3120221|entityMap|0|LINK|mutability|MUTABLE|url|http://www.aaronsw.com/2002/html2text/^0|Y|12|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I don't know C#, but there is a fairly small &amp; easy to read python html2txt script here: <a href="http://www.aaronsw.com/2002/html2text/" rel="nofollow noreferrer">http://www.aaronsw.com/2002/html2text/</a>

blocks|key|3120236|text|我从一个可靠的消息来源听说，如果你正在用.Net进行超文本标记语言解析，你应该再看看超文本标记语言敏捷性包。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3120237|http://www.codeplex.com/htmlagilitypack|offset|length|3120238|一些样品。|3120239|HTML+Agility+pack+-+parsing+tables|3120240|entityMap|0|LINK|mutability|MUTABLE|url|1|https://stackoverflow.com/questions/655603/html-agility-pack-parsing-tables^0|0|0|13|0|0|0|0|Y|1|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@$D|U|E|V|1|W]]|A|$]]|$1|F|3|G|5|6|7|X|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|Y|8|@]|9|@$D|Z|E|10|1|11]]|A|$]]|$1|J|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|C]]|Q|$5|M|N|O|A|$P|R]]]]

I've heard from a reliable source that, if you're doing HTML parsing in .Net, you should look at the HTML agility pack again.. 

<a href="http://www.codeplex.com/htmlagilitypack" rel="nofollow noreferrer">http://www.codeplex.com/htmlagilitypack</a>

Some sample on SO.. 

<a href="https://stackoverflow.com/questions/655603/html-agility-pack-parsing-tables">HTML Agility pack - parsing tables</a>

blocks|key|3332879|text|Another+post建议使用HTML+agility+pack|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3332880|3332881|这是一个敏捷的超文本标记语言解析器，它构建了一个读/写DOM，并支持普通的XPATH或XSLT+(实际上你不需要理解XPATH或XSLT就可以使用它，不用担心...)。它是一个.NET代码库，允许你解析“网络之外”的超文本标记语言文件。该解析器对“真实世界”格式错误的HTML非常容忍。该对象模型非常类似于所提出的System.Xml，但用于HTML文档(或流)。|blockquote|3332882|3332883|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/356597/render-or-convert-html-to-formatted-text-net|1|http://www.codeplex.com/htmlagilitypack^0|0|C|0|G|H|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]|$A|W|B|X|1|Y]]|C|$]]|$1|D|3|-4|5|6|7|Z|8|@]|9|@]|C|$]]|$1|E|3|F|5|G|7|10|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|11|8|@]|9|@]|C|$]]|$1|I|3|-4|5|6|7|12|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]|Q|$5|L|M|N|C|$O|R]]]]

<a href="https://stackoverflow.com/questions/356597/render-or-convert-html-to-formatted-text-net">Another post</a> suggests the <a href="http://www.codeplex.com/htmlagilitypack" rel="nofollow noreferrer">HTML agility pack</a>:

<blockquote>
 This is an agile HTML parser that
 builds a read/write DOM and supports
 plain XPATH or XSLT (you actually
 don't HAVE to understand XPATH nor
 XSLT to use it, don't worry...). It is
 a .NET code library that allows you to
 parse "out of the web" HTML files. The
 parser is very tolerant with "real
 world" malformed HTML. The object
 model is very similar to what proposes
 System.Xml, but for HTML documents (or
 streams).
</blockquote>

blocks|key|343728|text|您可以使用以下代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|343729|+public+static+string+StripHTML(string+HTMLText,+bool+decode+=+true)
++++++++{
++++++++++++Regex+reg+=+new+Regex("<[%5E>]%2B>",+RegexOptions.IgnoreCase);
++++++++++++var+stripped+=+reg.Replace(HTMLText,+"");
++++++++++++return+decode+?+HttpUtility.HtmlDecode(stripped)+:+stripped;
++++++++}|code-block|syntax|javascript|343730|已更新|offset|length|style|BOLD|343731|感谢您的评论，我已经更新以改进此功能|343732|entityMap^0|0|0|0|3|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

You could use this:

<pre><code> public static string StripHTML(string HTMLText, bool decode = true)
 {
 Regex reg = new Regex("&lt;[^&gt;]+&gt;", RegexOptions.IgnoreCase);
 var stripped = reg.Replace(HTMLText, "");
 return decode ? HttpUtility.HtmlDecode(stripped) : stripped;
 }
</code></pre>

Updated

Thanks for the comments I have updated to improve this function

blocks|key|345090|text|我以前也用过Detagger。它在将HTML格式化为文本方面做得非常好，而且它不仅仅是一个标签去除器。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|345091|entityMap|0|LINK|mutability|MUTABLE|url|http://www.jafsoft.com/detagger/^0|6|8|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I have used <a href="http://www.jafsoft.com/detagger/" rel="nofollow noreferrer">Detagger</a> in the past. It does a pretty good job of formatting the HTML as text and is more than just a tag remover.

blocks|key|346053|text|这是在C#中将HTML转换为文本或RTF的另一个解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|346054|++++SautinSoft.HtmlToRtf+h+=+new+SautinSoft.HtmlToRtf();
++++h.OutputFormat+=+HtmlToRtf.eOutputFormat.TextUnicode;
++++string+text+=+h.ConvertString(htmlString);|code-block|syntax|javascript|346055|这个库不是免费的，这是商业产品，也是我自己的产品。|346056|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

This is another solution to convert HTML to Text or RTF in C#:

<pre><code> SautinSoft.HtmlToRtf h = new SautinSoft.HtmlToRtf();
 h.OutputFormat = HtmlToRtf.eOutputFormat.TextUnicode;
 string text = h.ConvertString(htmlString);
</code></pre>

This library is not free, this is commercial product and it is my own product.

blocks|key|3332937|text|我有一个使用Markdown+XSLT文件来转换HTML+Source的recently+blogged+on+a+solution。当然，HTML源代码首先需要是有效的XML|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3332938|entityMap|0|LINK|mutability|MUTABLE|url|http://www.prolificnotion.co.uk/index.php/2009/11/04/convert-html-to-plain-text-in-c-using-markdown/^0|10|U|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I have <a href="http://www.prolificnotion.co.uk/index.php/2009/11/04/convert-html-to-plain-text-in-c-using-markdown/" rel="nofollow noreferrer">recently blogged on a solution</a> that worked for me by using a Markdown XSLT file to transform the HTML Source. The HTML source will of course need to be valid XML first

blocks|key|3120330|text|您可以使用WebBrowser控件在内存中呈现html内容。触发LoadCompleted事件后...|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|3120331|IHTMLDocument2+htmlDoc+=+(IHTMLDocument2)webBrowser.Document;
string+innerHTML+=+htmlDoc.body.innerHTML;
string+innerText+=+htmlDoc.body.innerText;|code-block|syntax|javascript|3120332|entityMap^0|5|A|W|D|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

You can use WebBrowser control to render in memory your html content. After LoadCompleted event fired...

<pre><code>IHTMLDocument2 htmlDoc = (IHTMLDocument2)webBrowser.Document;
string innerHTML = htmlDoc.body.innerHTML;
string innerText = htmlDoc.body.innerText;
</code></pre>

blocks|key|345112|text|在Genexus中，您可以使用Regex|type|unstyled|depth|inlineStyleRanges|entityRanges|data|345113|&pattern+=+'<%5E>%2B>‘|345114|模式(&&TSTRPNOT=&TSTRPNOT.ReplaceRegEx，"")|345115|在gestirlo+con+Regex中，|345116|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

In Genexus You can made with Regex

&amp;pattern = '&lt;[^>]+>'

&amp;TSTRPNOT=&amp;TSTRPNOT.ReplaceRegEx(&amp;pattern,"")

In Genexus possiamo gestirlo con Regex,

blocks|key|343777|text|假设您具有格式良好的html，您也可以尝试XSL转换。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|343778|下面是一个例子：|343779|using+System;
using+System.IO;
using+System.Xml.Linq;
using+System.Xml.XPath;
using+System.Xml.Xsl;

class+Html2TextExample
{
++++public+static+string+Html2Text(XDocument+source)
++++{
++++++++var+writer+=+new+StringWriter();
++++++++Html2Text(source,+writer);
++++++++return+writer.ToString();
++++}

++++public+static+void+Html2Text(XDocument+source,+TextWriter+output)
++++{
++++++++Transformer.Transform(source.CreateReader(),+null,+output);
++++}

++++public+static+XslCompiledTransform+_transformer;
++++public+static+XslCompiledTransform+Transformer
++++{
++++++++get
++++++++{
++++++++++++if+(_transformer+==+null)
++++++++++++{
++++++++++++++++_transformer+=+new+XslCompiledTransform();
++++++++++++++++var+xsl+=+XDocument.Parse(@"<?xml+version='1.0'?><xsl:stylesheet+version=""1.0""+xmlns:xsl=""http://www.w3.org/1999/XSL/Transform""+exclude-result-prefixes=""xsl""><xsl:output+method=""html""+indent=""yes""+version=""4.0""+omit-xml-declaration=""yes""+encoding=""UTF-8""+/><xsl:template+match=""/""><xsl:value-of+select="".""+/></xsl:template></xsl:stylesheet>");
++++++++++++++++_transformer.Load(xsl.CreateNavigator());
++++++++++++}
++++++++++++return+_transformer;
++++++++}
++++}

++++static+void+Main(string[]+args)
++++{
++++++++var+html+=+XDocument.Parse("<html><body><div>Hello+world!</div></body></html>");
++++++++var+text+=+Html2Text(html);
++++++++Console.WriteLine(text);
++++}
}|code-block|syntax|javascript|343780|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Assuming you have well formed html, you could also maybe try an XSL transform.

Here's an example:

<pre><code>using System;
using System.IO;
using System.Xml.Linq;
using System.Xml.XPath;
using System.Xml.Xsl;

class Html2TextExample
{
 public static string Html2Text(XDocument source)
 {
 var writer = new StringWriter();
 Html2Text(source, writer);
 return writer.ToString();
 }

 public static void Html2Text(XDocument source, TextWriter output)
 {
 Transformer.Transform(source.CreateReader(), null, output);
 }

 public static XslCompiledTransform _transformer;
 public static XslCompiledTransform Transformer
 {
 get
 {
 if (_transformer == null)
 {
 _transformer = new XslCompiledTransform();
 var xsl = XDocument.Parse(@"&lt;?xml version='1.0'?&gt;&lt;xsl:stylesheet version=""1.0"" xmlns:xsl=""http://www.w3.org/1999/XSL/Transform"" exclude-result-prefixes=""xsl""&gt;&lt;xsl:output method=""html"" indent=""yes"" version=""4.0"" omit-xml-declaration=""yes"" encoding=""UTF-8"" /&gt;&lt;xsl:template match=""/""&gt;&lt;xsl:value-of select=""."" /&gt;&lt;/xsl:template&gt;&lt;/xsl:stylesheet&gt;");
 _transformer.Load(xsl.CreateNavigator());
 }
 return _transformer;
 }
 }

 static void Main(string[] args)
 {
 var html = XDocument.Parse("&lt;html&gt;&lt;body&gt;&lt;div&gt;Hello world!&lt;/div&gt;&lt;/body&gt;&lt;/html&gt;");
 var text = Html2Text(html);
 Console.WriteLine(text);
 }
}
</code></pre>

blocks|key|348723|text|因为我想用LF和bullets转换成纯文本，所以我在codeproject上找到了这个很好的解决方案，它涵盖了许多转换用例：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|348724|Convert+HTML+to+Plain+Text|offset|length|348725|是的，看起来很大，但工作起来很好。|348726|entityMap|0|LINK|mutability|MUTABLE|url|http://www.codeproject.com/Articles/11902/Convert-HTML-to-Plain-Text^0|0|0|Q|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@$D|R|E|S|1|T]]|A|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

Because I wanted conversion to plain text with LF and bullets, I found this pretty solution on codeproject, which covers many conversion usecases:

<a href="http://www.codeproject.com/Articles/11902/Convert-HTML-to-Plain-Text" rel="nofollow">Convert HTML to Plain Text</a>

Yep, looks so big, but works fine.

blocks|key|3120448|text|只是给后人的一个关于HtmlAgilityPack的注释。该项目包含一个example+of+parsing+text+to+html，正如OP所指出的，它根本不像任何编写HTML语言的人所设想的那样处理空白。有一些全文呈现解决方案，其他人注意到这个问题，这不是(它甚至不能处理当前表单中的表格)，但它是轻量级和快速的，这就是我创建一个简单的HTML电子邮件文本版本所需要的。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3120449|using+System.IO;
using+System.Text.RegularExpressions;
using+HtmlAgilityPack;

//small+but+important+modification+to+class+https://github.com/zzzprojects/html-agility-pack/blob/master/src/Samples/Html2Txt/HtmlConvert.cs
public+static+class+HtmlToText
{

++++public+static+string+Convert(string+path)
++++{
++++++++HtmlDocument+doc+=+new+HtmlDocument();
++++++++doc.Load(path);
++++++++return+ConvertDoc(doc);
++++}

++++public+static+string+ConvertHtml(string+html)
++++{
++++++++HtmlDocument+doc+=+new+HtmlDocument();
++++++++doc.LoadHtml(html);
++++++++return+ConvertDoc(doc);
++++}

++++public+static+string+ConvertDoc+(HtmlDocument+doc)
++++{
++++++++using+(StringWriter+sw+=+new+StringWriter())
++++++++{
++++++++++++ConvertTo(doc.DocumentNode,+sw);
++++++++++++sw.Flush();
++++++++++++return+sw.ToString();
++++++++}
++++}

++++internal+static+void+ConvertContentTo(HtmlNode+node,+TextWriter+outText,+PreceedingDomTextInfo+textInfo)
++++{
++++++++foreach+(HtmlNode+subnode+in+node.ChildNodes)
++++++++{
++++++++++++ConvertTo(subnode,+outText,+textInfo);
++++++++}
++++}
++++public+static+void+ConvertTo(HtmlNode+node,+TextWriter+outText)
++++{
++++++++ConvertTo(node,+outText,+new+PreceedingDomTextInfo(false));
++++}
++++internal+static+void+ConvertTo(HtmlNode+node,+TextWriter+outText,+PreceedingDomTextInfo+textInfo)
++++{
++++++++string+html;
++++++++switch+(node.NodeType)
++++++++{
++++++++++++case+HtmlNodeType.Comment:
++++++++++++++++//+don't+output+comments
++++++++++++++++break;
++++++++++++case+HtmlNodeType.Document:
++++++++++++++++ConvertContentTo(node,+outText,+textInfo);
++++++++++++++++break;
++++++++++++case+HtmlNodeType.Text:
++++++++++++++++//+script+and+style+must+not+be+output
++++++++++++++++string+parentName+=+node.ParentNode.Name;
++++++++++++++++if+((parentName+==+"script")+%7C%7C+(parentName+==+"style"))
++++++++++++++++{
++++++++++++++++++++break;
++++++++++++++++}
++++++++++++++++//+get+text
++++++++++++++++html+=+((HtmlTextNode)node).Text;
++++++++++++++++//+is+it+in+fact+a+special+closing+node+output+as+text?
++++++++++++++++if+(HtmlNode.IsOverlappedClosingElement(html))
++++++++++++++++{
++++++++++++++++++++break;
++++++++++++++++}
++++++++++++++++//+check+the+text+is+meaningful+and+not+a+bunch+of+whitespaces
++++++++++++++++if+(html.Length+==+0)
++++++++++++++++{
++++++++++++++++++++break;
++++++++++++++++}
++++++++++++++++if+(!textInfo.WritePrecedingWhiteSpace+%7C%7C+textInfo.LastCharWasSpace)
++++++++++++++++{
++++++++++++++++++++html=+html.TrimStart();
++++++++++++++++++++if+(html.Length+==+0)+{+break;+}
++++++++++++++++++++textInfo.IsFirstTextOfDocWritten.Value+=+textInfo.WritePrecedingWhiteSpace+=+true;
++++++++++++++++}
++++++++++++++++outText.Write(HtmlEntity.DeEntitize(Regex.Replace(html.TrimEnd(),+@"\s{2,}",+"+")));
++++++++++++++++if+(textInfo.LastCharWasSpace+=+char.IsWhiteSpace(html[html.Length+-+1]))
++++++++++++++++{
++++++++++++++++++++outText.Write('+');
++++++++++++++++}
++++++++++++++++++++break;
++++++++++++case+HtmlNodeType.Element:
++++++++++++++++string+endElementString+=+null;
++++++++++++++++bool+isInline;
++++++++++++++++bool+skip+=+false;
++++++++++++++++int+listIndex+=+0;
++++++++++++++++switch+(node.Name)
++++++++++++++++{
++++++++++++++++++++case+"nav":
++++++++++++++++++++++++skip+=+true;
++++++++++++++++++++++++isInline+=+false;
++++++++++++++++++++++++break;
++++++++++++++++++++case+"body":
++++++++++++++++++++case+"section":
++++++++++++++++++++case+"article":
++++++++++++++++++++case+"aside":
++++++++++++++++++++case+"h1":
++++++++++++++++++++case+"h2":
++++++++++++++++++++case+"header":
++++++++++++++++++++case+"footer":
++++++++++++++++++++case+"address":
++++++++++++++++++++case+"main":
++++++++++++++++++++case+"div":
++++++++++++++++++++case+"p":+//+stylistic+-+adjust+as+you+tend+to+use
++++++++++++++++++++++++if+(textInfo.IsFirstTextOfDocWritten)
++++++++++++++++++++++++{
++++++++++++++++++++++++++++outText.Write("\r\n");
++++++++++++++++++++++++}
++++++++++++++++++++++++endElementString+=+"\r\n";
++++++++++++++++++++++++isInline+=+false;
++++++++++++++++++++++++break;
++++++++++++++++++++case+"br":
++++++++++++++++++++++++outText.Write("\r\n");
++++++++++++++++++++++++skip+=+true;
++++++++++++++++++++++++textInfo.WritePrecedingWhiteSpace+=+false;
++++++++++++++++++++++++isInline+=+true;
++++++++++++++++++++++++break;
++++++++++++++++++++case+"a":
++++++++++++++++++++++++if+(node.Attributes.Contains("href"))
++++++++++++++++++++++++{
++++++++++++++++++++++++++++string+href+=+node.Attributes["href"].Value.Trim();
++++++++++++++++++++++++++++if+(node.InnerText.IndexOf(href,+StringComparison.InvariantCultureIgnoreCase)==-1)
++++++++++++++++++++++++++++{
++++++++++++++++++++++++++++++++endElementString+=++"<"+%2B+href+%2B+">";
++++++++++++++++++++++++++++}++
++++++++++++++++++++++++}
++++++++++++++++++++++++isInline+=+true;
++++++++++++++++++++++++break;
++++++++++++++++++++case+"li":+
++++++++++++++++++++++++if(textInfo.ListIndex>0)
++++++++++++++++++++++++{
++++++++++++++++++++++++++++outText.Write("\r\n{0}.\t",+textInfo.ListIndex%2B%2B);+
++++++++++++++++++++++++}
++++++++++++++++++++++++else
++++++++++++++++++++++++{
++++++++++++++++++++++++++++outText.Write("\r\n*\t");+//using+'*'+as+bullet+char,+with+tab+after,+but+whatever+you+want+eg+"\t->",+if+utf-8+0x2022
++++++++++++++++++++++++}
++++++++++++++++++++++++isInline+=+false;
++++++++++++++++++++++++break;
++++++++++++++++++++case+"ol":+
++++++++++++++++++++++++listIndex+=+1;
++++++++++++++++++++++++goto+case+"ul";
++++++++++++++++++++case+"ul":+//not+handling+nested+lists+any+differently+at+this+stage+-+that+is+getting+close+to+rendering+problems
++++++++++++++++++++++++endElementString+=+"\r\n";
++++++++++++++++++++++++isInline+=+false;
++++++++++++++++++++++++break;
++++++++++++++++++++case+"img":+//inline-block+in+reality
++++++++++++++++++++++++if+(node.Attributes.Contains("alt"))
++++++++++++++++++++++++{
++++++++++++++++++++++++++++outText.Write('['+%2B+node.Attributes["alt"].Value);
++++++++++++++++++++++++++++endElementString+=+"]";
++++++++++++++++++++++++}
++++++++++++++++++++++++if+(node.Attributes.Contains("src"))
++++++++++++++++++++++++{
++++++++++++++++++++++++++++outText.Write('<'+%2B+node.Attributes["src"].Value+%2B+'>');
++++++++++++++++++++++++}
++++++++++++++++++++++++isInline+=+true;
++++++++++++++++++++++++break;
++++++++++++++++++++default:
++++++++++++++++++++++++isInline+=+true;
++++++++++++++++++++++++break;
++++++++++++++++}
++++++++++++++++if+(!skip+&&+node.HasChildNodes)
++++++++++++++++{
++++++++++++++++++++ConvertContentTo(node,+outText,+isInline+?+textInfo+:+new+PreceedingDomTextInfo(textInfo.IsFirstTextOfDocWritten){+ListIndex+=+listIndex+});
++++++++++++++++}
++++++++++++++++if+(endElementString+!=+null)
++++++++++++++++{
++++++++++++++++++++outText.Write(endElementString);
++++++++++++++++}
++++++++++++++++break;
++++++++}
++++}
}
internal+class+PreceedingDomTextInfo
{
++++public+PreceedingDomTextInfo(BoolWrapper+isFirstTextOfDocWritten)
++++{
++++++++IsFirstTextOfDocWritten+=+isFirstTextOfDocWritten;
++++}
++++public+bool+WritePrecedingWhiteSpace+{get;set;}
++++public+bool+LastCharWasSpace+{+get;+set;+}
++++public+readonly+BoolWrapper+IsFirstTextOfDocWritten;
++++public+int+ListIndex+{+get;+set;+}
}
internal+class+BoolWrapper
{
++++public+BoolWrapper()+{+}
++++public+bool+Value+{+get;+set;+}
++++public+static+implicit+operator+bool(BoolWrapper+boolWrapper)
++++{
++++++++return+boolWrapper.Value;
++++}
++++public+static+implicit+operator+BoolWrapper(bool+boolWrapper)
++++{
++++++++return+new+BoolWrapper{+Value+=+boolWrapper+};
++++}
}|code-block|syntax|javascript|3120450|举个例子，下面的HTML代码...|3120451|<!DOCTYPE+HTML>
<html>
++++<head>
++++</head>
++++<body>
++++++++<header>
++++++++++++Whatever+Inc.
++++++++</header>
++++++++<main>
++++++++++++
++++++++++++++++Thanks+for+your+enquiry.+As+this+is+the+1st+time+you+have+contacted+us,+we+would+like+to+clarify+a+few+things:
++++++++++++
++++++++++++<ol>
++++++++++++++++<li>
++++++++++++++++++++Please+confirm+this+is+your+email+by+replying.
++++++++++++++++</li>
++++++++++++++++<li>
++++++++++++++++++++Then+perform+this+step.
++++++++++++++++</li>
++++++++++++</ol>
++++++++++++
++++++++++++++++Please+solve+this+<img+alt="complex+equation"+src="http://upload.wikimedia.org/wikipedia/commons/8/8d/First_Equation_Ever.png"/>.+Then,+in+any+order,+could+you+please:
++++++++++++
++++++++++++<ul>
++++++++++++++++<li>
++++++++++++++++++++a+point.
++++++++++++++++</li>
++++++++++++++++<li>
++++++++++++++++++++another+point,+with+a+<a+href="http://en.wikipedia.org/wiki/Hyperlink">hyperlink</a>.
++++++++++++++++</li>
++++++++++++</ul>
++++++++++++
++++++++++++++++Sincerely,
++++++++++++
++++++++++++
++++++++++++++++The+whatever.com+team
++++++++++++
++++++++</main>
++++++++<footer>
++++++++++++Ph:+000+000+000 
++++++++++++mail:+whatever+st
++++++++</footer>
++++</body>
</html>|3120452|将...will转换为：|3120453|Whatever+Inc.+


Thanks+for+your+enquiry.+As+this+is+the+1st+time+you+have+contacted+us,+we+would+like+to+clarify+a+few+things:+

1.++Please+confirm+this+is+your+email+by+replying.+
2.++Then+perform+this+step.+

Please+solve+this+[complex+equation<http://upload.wikimedia.org/wikipedia/commons/8/8d/First_Equation_Ever.png>].+Then,+in+any+order,+could+you+please:+

*+++a+point.+
*+++another+point,+with+a+hyperlink<http://en.wikipedia.org/wiki/Hyperlink>.+

Sincerely,+

The+whatever.com+team+


Ph:+000+000+000
mail:+whatever+st+|3120454|与...as相反的是：|3120455|++++++++Whatever+Inc.


++++++++++++Thanks+for+your+enquiry.+As+this+is+the+1st+time+you+have+contacted+us,+we+would+like+to+clarify+a+few+things:

++++++++++++++++Please+confirm+this+is+your+email+by+replying.

++++++++++++++++Then+perform+this+step.


++++++++++++Please+solve+this+.+Then,+in+any+order,+could+you+please:

++++++++++++++++a+point.

++++++++++++++++another+point,+with+a+hyperlink.


++++++++++++Sincerely,


++++++++++++The+whatever.com+team

++++++++Ph:+000+000+000
++++++++mail:+whatever+st|3120456|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/zzzprojects/html-agility-pack/blob/master/src/Samples/Html2Txt/HtmlConvert.cs^0|10|V|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@$A|13|B|14|1|15]]|C|$]]|$1|D|3|E|5|F|7|16|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|17|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|18|8|@]|9|@]|C|$G|H]]|$1|M|3|N|5|6|7|19|8|@]|9|@]|C|$]]|$1|O|3|P|5|F|7|1A|8|@]|9|@]|C|$G|H]]|$1|Q|3|R|5|6|7|1B|8|@]|9|@]|C|$]]|$1|S|3|T|5|F|7|1C|8|@]|9|@]|C|$G|H]]|$1|U|3|-4|5|6|7|1D|8|@]|9|@]|C|$]]]|V|$W|$5|X|Y|Z|C|$10|11]]]]

Just a note about the HtmlAgilityPack for posterity. The project contains an <a href="https://github.com/zzzprojects/html-agility-pack/blob/master/src/Samples/Html2Txt/HtmlConvert.cs" rel="noreferrer">example of parsing text to html</a>, which, as noted by the OP, does not handle whitespace at all like anyone writing HTML would envisage. There are full-text rendering solutions out there, noted by others to this question, which this is not (it cannot even handle tables in its current form), but it is lightweight and fast, which is all I wanted for creating a simple text version of HTML emails. 

<pre><code>using System.IO;
using System.Text.RegularExpressions;
using HtmlAgilityPack;

//small but important modification to class https://github.com/zzzprojects/html-agility-pack/blob/master/src/Samples/Html2Txt/HtmlConvert.cs
public static class HtmlToText
{

 public static string Convert(string path)
 {
 HtmlDocument doc = new HtmlDocument();
 doc.Load(path);
 return ConvertDoc(doc);
 }

 public static string ConvertHtml(string html)
 {
 HtmlDocument doc = new HtmlDocument();
 doc.LoadHtml(html);
 return ConvertDoc(doc);
 }

 public static string ConvertDoc (HtmlDocument doc)
 {
 using (StringWriter sw = new StringWriter())
 {
 ConvertTo(doc.DocumentNode, sw);
 sw.Flush();
 return sw.ToString();
 }
 }

 internal static void ConvertContentTo(HtmlNode node, TextWriter outText, PreceedingDomTextInfo textInfo)
 {
 foreach (HtmlNode subnode in node.ChildNodes)
 {
 ConvertTo(subnode, outText, textInfo);
 }
 }
 public static void ConvertTo(HtmlNode node, TextWriter outText)
 {
 ConvertTo(node, outText, new PreceedingDomTextInfo(false));
 }
 internal static void ConvertTo(HtmlNode node, TextWriter outText, PreceedingDomTextInfo textInfo)
 {
 string html;
 switch (node.NodeType)
 {
 case HtmlNodeType.Comment:
 // don't output comments
 break;
 case HtmlNodeType.Document:
 ConvertContentTo(node, outText, textInfo);
 break;
 case HtmlNodeType.Text:
 // script and style must not be output
 string parentName = node.ParentNode.Name;
 if ((parentName == "script") || (parentName == "style"))
 {
 break;
 }
 // get text
 html = ((HtmlTextNode)node).Text;
 // is it in fact a special closing node output as text?
 if (HtmlNode.IsOverlappedClosingElement(html))
 {
 break;
 }
 // check the text is meaningful and not a bunch of whitespaces
 if (html.Length == 0)
 {
 break;
 }
 if (!textInfo.WritePrecedingWhiteSpace || textInfo.LastCharWasSpace)
 {
 html= html.TrimStart();
 if (html.Length == 0) { break; }
 textInfo.IsFirstTextOfDocWritten.Value = textInfo.WritePrecedingWhiteSpace = true;
 }
 outText.Write(HtmlEntity.DeEntitize(Regex.Replace(html.TrimEnd(), @"\s{2,}", " ")));
 if (textInfo.LastCharWasSpace = char.IsWhiteSpace(html[html.Length - 1]))
 {
 outText.Write(' ');
 }
 break;
 case HtmlNodeType.Element:
 string endElementString = null;
 bool isInline;
 bool skip = false;
 int listIndex = 0;
 switch (node.Name)
 {
 case "nav":
 skip = true;
 isInline = false;
 break;
 case "body":
 case "section":
 case "article":
 case "aside":
 case "h1":
 case "h2":
 case "header":
 case "footer":
 case "address":
 case "main":
 case "div":
 case "p": // stylistic - adjust as you tend to use
 if (textInfo.IsFirstTextOfDocWritten)
 {
 outText.Write("\r\n");
 }
 endElementString = "\r\n";
 isInline = false;
 break;
 case "br":
 outText.Write("\r\n");
 skip = true;
 textInfo.WritePrecedingWhiteSpace = false;
 isInline = true;
 break;
 case "a":
 if (node.Attributes.Contains("href"))
 {
 string href = node.Attributes["href"].Value.Trim();
 if (node.InnerText.IndexOf(href, StringComparison.InvariantCultureIgnoreCase)==-1)
 {
 endElementString = "&lt;" + href + "&gt;";
 } 
 }
 isInline = true;
 break;
 case "li": 
 if(textInfo.ListIndex&gt;0)
 {
 outText.Write("\r\n{0}.\t", textInfo.ListIndex++); 
 }
 else
 {
 outText.Write("\r\n*\t"); //using '*' as bullet char, with tab after, but whatever you want eg "\t-&gt;", if utf-8 0x2022
 }
 isInline = false;
 break;
 case "ol": 
 listIndex = 1;
 goto case "ul";
 case "ul": //not handling nested lists any differently at this stage - that is getting close to rendering problems
 endElementString = "\r\n";
 isInline = false;
 break;
 case "img": //inline-block in reality
 if (node.Attributes.Contains("alt"))
 {
 outText.Write('[' + node.Attributes["alt"].Value);
 endElementString = "]";
 }
 if (node.Attributes.Contains("src"))
 {
 outText.Write('&lt;' + node.Attributes["src"].Value + '&gt;');
 }
 isInline = true;
 break;
 default:
 isInline = true;
 break;
 }
 if (!skip &amp;&amp; node.HasChildNodes)
 {
 ConvertContentTo(node, outText, isInline ? textInfo : new PreceedingDomTextInfo(textInfo.IsFirstTextOfDocWritten){ ListIndex = listIndex });
 }
 if (endElementString != null)
 {
 outText.Write(endElementString);
 }
 break;
 }
 }
}
internal class PreceedingDomTextInfo
{
 public PreceedingDomTextInfo(BoolWrapper isFirstTextOfDocWritten)
 {
 IsFirstTextOfDocWritten = isFirstTextOfDocWritten;
 }
 public bool WritePrecedingWhiteSpace {get;set;}
 public bool LastCharWasSpace { get; set; }
 public readonly BoolWrapper IsFirstTextOfDocWritten;
 public int ListIndex { get; set; }
}
internal class BoolWrapper
{
 public BoolWrapper() { }
 public bool Value { get; set; }
 public static implicit operator bool(BoolWrapper boolWrapper)
 {
 return boolWrapper.Value;
 }
 public static implicit operator BoolWrapper(bool boolWrapper)
 {
 return new BoolWrapper{ Value = boolWrapper };
 }
}
</code></pre>

As an example, the following HTML code...

<pre><code>&lt;!DOCTYPE HTML&gt;
&lt;html&gt;
 &lt;head&gt;
 &lt;/head&gt;
 &lt;body&gt;
 &lt;header&gt;
 Whatever Inc.
 &lt;/header&gt;
 &lt;main&gt;
 &lt;p&gt;
 Thanks for your enquiry. As this is the 1&lt;sup&gt;st&lt;/sup&gt; time you have contacted us, we would like to clarify a few things:
 &lt;/p&gt;
 &lt;ol&gt;
 &lt;li&gt;
 Please confirm this is your email by replying.
 &lt;/li&gt;
 &lt;li&gt;
 Then perform this step.
 &lt;/li&gt;
 &lt;/ol&gt;
 &lt;p&gt;
 Please solve this &lt;img alt="complex equation" src="http://upload.wikimedia.org/wikipedia/commons/8/8d/First_Equation_Ever.png"/&gt;. Then, in any order, could you please:
 &lt;/p&gt;
 &lt;ul&gt;
 &lt;li&gt;
 a point.
 &lt;/li&gt;
 &lt;li&gt;
 another point, with a &lt;a href="http://en.wikipedia.org/wiki/Hyperlink"&gt;hyperlink&lt;/a&gt;.
 &lt;/li&gt;
 &lt;/ul&gt;
 &lt;p&gt;
 Sincerely,
 &lt;/p&gt;
 &lt;p&gt;
 The whatever.com team
 &lt;/p&gt;
 &lt;/main&gt;
 &lt;footer&gt;
 Ph: 000 000 000&lt;br/&gt;
 mail: whatever st
 &lt;/footer&gt;
 &lt;/body&gt;
&lt;/html&gt;
</code></pre>

...will be transformed into:

<pre><code>Whatever Inc. 


Thanks for your enquiry. As this is the 1st time you have contacted us, we would like to clarify a few things: 

1. Please confirm this is your email by replying. 
2. Then perform this step. 

Please solve this [complex equation&lt;http://upload.wikimedia.org/wikipedia/commons/8/8d/First_Equation_Ever.png&gt;]. Then, in any order, could you please: 

* a point. 
* another point, with a hyperlink&lt;http://en.wikipedia.org/wiki/Hyperlink&gt;. 

Sincerely, 

The whatever.com team 


Ph: 000 000 000
mail: whatever st 
</code></pre>

...as opposed to:

<pre><code> Whatever Inc.


 Thanks for your enquiry. As this is the 1st time you have contacted us, we would like to clarify a few things:

 Please confirm this is your email by replying.

 Then perform this step.


 Please solve this . Then, in any order, could you please:

 a point.

 another point, with a hyperlink.


 Sincerely,


 The whatever.com team

 Ph: 000 000 000
 mail: whatever st
</code></pre>

blocks|key|343805|text|如果您使用的是HTMLFramework4.5，您可以使用System.Net.WebUtility.HtmlDecode()，它接受一个.NET编码字符串并返回一个解码字符串。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|343806|文档记录在MSDN上：http://msdn.microsoft.com/en-us/library/system.net.webutility.htmldecode(v=vs.110).aspx|offset|length|343807|你也可以在Windows应用商店应用中使用它。|343808|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.net.webutility.htmldecode(v=vs.110).aspx^0|0|B|2F|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@$D|R|E|S|1|T]]|A|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

If you are using .NET framework 4.5 you can use System.Net.WebUtility.HtmlDecode() which takes a HTML encoded string and returns a decoded string.

Documented on MSDN at: <a href="http://msdn.microsoft.com/en-us/library/system.net.webutility.htmldecode(v=vs.110).aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/system.net.webutility.htmldecode(v=vs.110).aspx</a>

You can use this in a Windows Store app as well.

blocks|key|3120474|text|尝试简单易用的方法：只需调用StripHTML(WebBrowserControl_name);|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|CODE|entityRanges|data|3120475|+public+string+StripHTML(WebBrowser+webp)
++++++++{
++++++++++++try
++++++++++++{
++++++++++++++++doc.execCommand("SelectAll",+true,+null);
++++++++++++++++IHTMLSelectionObject+currentSelection+=+doc.selection;

++++++++++++++++if+(currentSelection+!=+null)
++++++++++++++++{
++++++++++++++++++++IHTMLTxtRange+range+=+currentSelection.createRange()+as+IHTMLTxtRange;
++++++++++++++++++++if+(range+!=+null)
++++++++++++++++++++{
++++++++++++++++++++++++currentSelection.empty();
++++++++++++++++++++++++return+range.text;
++++++++++++++++++++}
++++++++++++++++}
++++++++++++}
++++++++++++catch+(Exception+ep)
++++++++++++{
++++++++++++++++//MessageBox.Show(ep.Message);
++++++++++++}
++++++++++++return+"";

++++++++}|code-block|syntax|javascript|3120476|entityMap^0|0|A|E|Y|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|D]]|E|@]|F|$]]|$1|G|3|H|5|I|7|S|8|@]|E|@]|F|$J|K]]|$1|L|3|-4|5|6|7|T|8|@]|E|@]|F|$]]]|M|$]]

Try the easy and usable way: just call <code>StripHTML(WebBrowserControl_name);</code> 

<pre><code> public string StripHTML(WebBrowser webp)
 {
 try
 {
 doc.execCommand("SelectAll", true, null);
 IHTMLSelectionObject currentSelection = doc.selection;

 if (currentSelection != null)
 {
 IHTMLTxtRange range = currentSelection.createRange() as IHTMLTxtRange;
 if (range != null)
 {
 currentSelection.empty();
 return range.text;
 }
 }
 }
 catch (Exception ep)
 {
 //MessageBox.Show(ep.Message);
 }
 return "";

 }
</code></pre>

blocks|key|348752|text|我在使用HtmlAgility时遇到了一些解码问题，我不想花时间去研究它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|348753|相反，我使用了Microsoft+Team+Foundation+API中的that+utility：|offset|length|348754|var+text+=+HtmlFilter.ConvertToPlainText(htmlContent);|code-block|syntax|javascript|348755|entityMap|0|LINK|mutability|MUTABLE|url|https://msdn.microsoft.com/en-us/library/microsoft.teamfoundation.workitemtracking.controls.htmlfilter.converttoplaintext(v=vs.120).aspx^0|0|12|C|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@$D|U|E|V|1|W]]|A|$]]|$1|F|3|G|5|H|7|X|8|@]|9|@]|A|$I|J]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

I had some decoding issues with HtmlAgility and I didn't want to invest time investigating it.

Instead I used <a href="https://msdn.microsoft.com/en-us/library/microsoft.teamfoundation.workitemtracking.controls.htmlfilter.converttoplaintext(v=vs.120).aspx" rel="nofollow">that utility</a> from the Microsoft Team Foundation API:

<pre><code>var text = HtmlFilter.ConvertToPlainText(htmlContent);
</code></pre>

blocks|key|348757|text|此函数用于将“您在浏览器中看到的内容”转换为带换行符的纯文本。(如果你想在浏览器中看到结果，只需使用注释返回值)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|348758|public+string+HtmlFileToText(string+filePath)
{
++++using+(var+browser+=+new+WebBrowser())
++++{
++++++++string+text+=+File.ReadAllText(filePath);
++++++++browser.ScriptErrorsSuppressed+=+true;
++++++++browser.Navigate("about:blank");
++++++++browser?.Document?.OpenNew(false);
++++++++browser?.Document?.Write(text);
++++++++return+browser.Document?.Body?.InnerText;
++++++++//return+browser.Document?.Body?.InnerText.Replace(Environment.NewLine,+"<br+/>");
++++}+++
}|code-block|syntax|javascript|348759|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This function convert "What You See in the browser" to plain text with line breaks. (If you want to see result in the browser just use commented return value)

<pre><code>public string HtmlFileToText(string filePath)
{
 using (var browser = new WebBrowser())
 {
 string text = File.ReadAllText(filePath);
 browser.ScriptErrorsSuppressed = true;
 browser.Navigate("about:blank");
 browser?.Document?.OpenNew(false);
 browser?.Document?.Write(text);
 return browser.Document?.Body?.InnerText;
 //return browser.Document?.Body?.InnerText.Replace(Environment.NewLine, "&lt;br /&gt;");
 } 
}
</code></pre>

blocks|key|3120514|text|以下是使用HtmlAgilityPack的简短而甜蜜的答案。您可以在LinqPad中运行此命令。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3120515|var+html+=+"<div>..whatever+html</div>";
var+doc+=+new+HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(html);
var+plainText+=+doc.DocumentNode.InnerText;|code-block|syntax|javascript|3120516|我只是在任何需要超文本标记语言解析的.NET项目中使用HtmlAgilityPack。它简单、可靠、快速。|3120517|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Here is the short sweet answer using HtmlAgilityPack. You can run this in LinqPad.

<pre><code>var html = "&lt;div&gt;..whatever html&lt;/div&gt;";
var doc = new HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(html);
var plainText = doc.DocumentNode.InnerText;
</code></pre>

I simply use HtmlAgilityPack in any .NET project that needs HTML parsing. It's simple, reliable, and fast.

I'm looking for C# code to convert an HTML document to plain text. 

I'm not looking for simple tag stripping , but something that will output plain text with a reasonable preservation of the original layout.

The output should look like this:

<a href="http://www.w3.org/services/html2txt" rel="noreferrer">Html2Txt at W3C</a>

I've looked at the HTML Agility Pack, but I don't think that's what I need. Does anyone have any other suggestions?

EDIT: I just download the HTML Agility Pack from <a href="http://html-agility-pack.net/?z=codeplex" rel="noreferrer">CodePlex</a>, and ran the Html2Txt project. What a disappointment (at least the module that does html to text conversion)! All it did was strip the tags, flatten the tables, etc. The output didn't look anything like the Html2Txt @ W3C produced. Too bad that source doesn't seem to be available.
I was looking to see if there is a more "canned" solution available.

EDIT 2: Thank you everybody for your suggestions. FlySwat tipped me in the direction i wanted to go. I can use the <code>System.Diagnostics.Process</code> class to run lynx.exe with the "-dump" switch to send the text to standard output, and capture the stdout with <code>ProcessStartInfo.UseShellExecute = false</code> and <code>ProcessStartInfo.RedirectStandardOutput = true</code>. I'll wrap all this in a C# class. This code will be called only occassionly, so i'm not too concerned about spawning a new process vs. doing it in code. Plus, Lynx is FAST!!

How can I Convert HTML to Text in C#?

我正在寻找将C#文档转换为纯文本的HTML代码。我正在寻找的不是简单的标签剥离，而是一些将输出纯文本，并合理保留原始布局的东西。输出应如下所示：我看过HTML Agility Pack，但我不认为这是我需要的。还有没有其他的建议？编辑：我刚刚从下载了HTML Agility Pack，并运行了Html2Txt项目。多么...

问如何在C#中将HTML转换为文本？
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