Thanks for the help, CodeDOM specifically showed me a nice way,
now I'm working with this : http://www.stefansarstedt.com/templatemaschine.html
It's not the best and a bit dirty but doing the trick for me. It's LGPL which fits me, and short.
I've looked at the other suggestions but didn't like them, too complicated for what I want (and quite messy -tons of DLLs, dependencies etc.-)
