asp.net实现C#代码加亮显示

以下是代码片段：
StringWriter textBuffer = new StringWriter();
Match match= Regex.Match(HTMLStr,@"",RegexOptions.IgnoreCase | RegexOptions.Compiled);
if(match==null)
{
Response.Write(HTMLStr);
return;
}

string codeType = match.Groups["codeType"].Value;
string content = match.Groups["codeContent"].Value;
if(codeType==String.Empty || content==String.Empty)
{
Response.Write(HTMLStr);
return;
}
// MessageBox.Show(codeType);
// MessageBox.Show(content);
string[] sr = content.Split(Convert.ToChar("\n"));
if(codeType=="C#")
{
textBuffer.Write("

1<csharp>\r\n");   
2foreach(string sourceLine in sr)   
3{   
4textBuffer.Write(FixCSLine(sourceLine)) ;   
5textBuffer.Write("\r\n");   
6}   
7textBuffer.Write("</csharp>

");
}
else if(codeType=="JScript.Net")
{
textBuffer.Write("

1<jscript.net>\r\n");   
2foreach(string sourceLine in sr)   
3{   
4textBuffer.Write(FixJSLine(sourceLine)) ;   
5textBuffer.Write("\r\n");   
6}   
7textBuffer.Write("</jscript.net>

");
}
else if(codeType=="VB")
{
textBuffer.Write("

1<vb>\r\n");   
2foreach(string sourceLine in sr)   
3{   
4textBuffer.Write(FixVBLine(sourceLine)) ;   
5textBuffer.Write("\r\n");   
6}   
7textBuffer.Write("</vb>

");
}