C# Mavlink documentation

Is there documentation for this package https://github.com/ArduPilot/MissionPlanner/tree/master/ExtLibs/Mavlink , or is everything in it the same as in Pymavlink (Python-mavgen) · MAVLink Developer Guide

mostly the same
check https://github.com/ArduPilot/MissionPlanner/blob/master/ExtLibs/Mavlink/regenerate.bat

thanks for the answer, this file says that they implement the same functionality?