C# ASP.NET regular expression control

I want to remove the below st开发者_如何转开发yle tag code from the HTML and aspx file using a regular expression.

<style type="text/css">
    BODY { background-color:white; }
    TH { align:center; background-color:006563; color:white; font-family:arial; font-size:12pt; }
</style>

//Remove scripts
str = Regex.Replace(str, "`<script.*?>`.*?`</script>`", "", RegexOptions.Singleline);  

//Remove CSS styles, if any found
str = Regex.Replace(str, "`<style.*?>`(.| )*?`</style>`", "", RegexOptions.Singleline);

//Remove all HTML tags, leaving on the text inside.
str= Regex.Replace(str, "`<(.| )*?>`", "", RegexOptions.Singleline);

//Remove \r,\t,\n
str= str.Replace("\r", "").Replace("\n", "").Replace("\t", "");

The following regex can be used to remove the style tag from the Html code.

System.Text.RegularExpressions.Regex.Replace(HtmlData,
                     @"(<style[^*]*</style>)","",
                     System.Text.RegularExpressions.RegexOptions.IgnoreCase);

Check the above code and let me know whether it is fine for you.