C# 替换去除HTML标记方法，正则表达式

[from] http://blog.csdn.net/sgear/article/details/6263848
/// <summary> 
/// 将所有HTML标签替换成"" 
/// </summary> 
/// <param name="strHtml"></param> 
/// <returns></returns> 
public static string StripHTML(string strHtml) 
{ 
string[] aryReg ={ 
@"<script[^>]*?>.*?</script>", 
@"<(///s*)?!?((/w+:)?/w+)(/w+(/s*=?/s*(([""'])(file://[""'tbnr]|[^/7])*?/7|/w+)|.{0})|/s)*?(///s*)?>", 
@"([/r/n])[/s]+", 
@"&(quot|#34);", 
@"&(amp|#38);", 
@"&(lt|#60);", 
@"&(gt|#62);", 
@"&(nbsp|#160);", 
@"&(iexcl|#161);", 
@"&(cent|#162);", 
@"&(pound|#163);", 
@"&(copy|#169);", 
@"&#(/d+);", 
@"-->", 
@"<!--.*/n" 

}; 

string[] aryRep = { 
"", 
"", 
"", 
"/"", 
"&", 
"<", 
">", 
" ", 
"/xa1",//chr(161), 
"/xa2",//chr(162), 
"/xa3",//chr(163), 
"/xa9",//chr(169), 
"", 
"/r/n", 
"" 
}; 

string newReg = aryReg[0]; 
string strOutput = strHtml; 
for (int i = 0; i < aryReg.Length; i++) 
{ 
Regex regex = new Regex(aryReg[i], RegexOptions.IgnoreCase); 
strOutput = regex.Replace(strOutput, aryRep[i]); 
} 

strOutput.Replace("<", ""); 
strOutput.Replace(">", ""); 
strOutput.Replace("/r/n", ""); 


return strOutput; 
}