n the examples described on the xnua site, its clear how to use C# variables in the actual Lua scripts. Is there a ways to expose C# classes for use in Lua scripts?

For example like in this link,
http://einfall.blogspot.com/2005/07/advanced-lua.html
the lua script exposes a C# class.

I've been mucking around with this in the XNUA without much success.
Anyone know if this is possible? Didn't sound like this was a limitation on the xnua.org site.

Thanks!