I have added reference to
for Kangaroo2 plugin development for Rhino6.
I found how to use OnCurve and other goals .
If I am missing any other dll for Kangaroo 2 please let me know.
You should have all the needed files.
If you want to develop Custom Goals don’t forget to check out there : https://github.com/Dan-Piker/K2Goals
This is the paradise of the CustomGoals developpement for kangaroo