I never got very far in the end with using libtcod.net to write a C# roguelike. Mainly due to various issues with setting it up, and a general development ennui which had enveloped me over the winter (major personal issues & upheaval didn't help either).
I do see that there's a new version out now with improved C# documentation. I don't intend to start work on a C# roguelike until I get Kharne complete.
But after that I may end up writing some additional optional features (such as a hiscore/chat server in ASP.NET, which I have to learn soon for my day job.