As I am using a lot XML, XML Schema and XSLT, e.g. for the content published on Tech Head Brothers, it is natural to use FOP and it’s .NET port NFOP by Jason Pettys. Jason published a new version of NFOP based on the FOP version 0.20.5 that is working better than the first port. I encourage you to download this version to give it a try.
I wrote an article, in French, about NFOP that you can read on Tech Head Brothers: