Thanks to John Klimek and Chris Hamons, libtcod.net, the C# wrapper for libtcod, has been upgraded to the 1.4.1 version (don't believe what the homepage says, the 1.4.2beta 2 doesn't exist yet :D).
You can get it and try it there :
http://code.google.com/p/libtcod-net/downloads/list
Happy coding :) !