Practical tips for extracting the C # function of text in HTML code

<summary>
Remove HTML tags
</summary>
<param name= "strhtml" > including HTML source </param>
<returns> has been removed after the text </returns>
public static string striphtml (String strhtml)
{
string [] Aryreg ={
@ "<script[^>]*?>.*?</script>",

@ "< (\/\s*)?!? ((\w+:) \w+) (\w+ (\s*=?\s* ([[""]) (\\[""] 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;
}