The original is on archive.org.
Here is the code being used as and Extension to render code.
The format is
1: [code:c#;ln=on;alt=on]
2:
#region using
3:
using System;
using System.IO;
using System.Web;
using System.Text.RegularExpressions;
using BlogEngine.Core;
using BlogEngine.Core.Web;
using CodeFormatter;