This library allows reading and writing the main DAT file of Age of Empires II: The Conquerors, including the new tech tree section introduced with AoETechTree.
Lots of credit goes to the creators of the Advanced Genie Editor (http://aok.heavengames.com/blacksmith/showfile.php?fileid=11002) which source code I used to create this C# port of its genieutils library.