http://code.google.com/p/syntaxhighlighter/
You can change the starting line number by adding firstline[#]
.
<textarea name="code" class="c#:firstline[42]" rows="15" cols="100">
1 2 3 4 5 6 7 8 9 string path = ""; string safeReferrer = null; FileInfo fileInfo = new FileInfo(string.Format("{0}/{1}", path, image)); int index = 0;