Or lua or for a c# ? There is nothing about these in docs.

I did find this but its hardly a complete solution. There are new technical docs coming soon.
http://docs.cryengine.com/display/CEPRO ... rogramming

If you have any programming related questions i recommend joining the community on Slack
viewtopic.php?f=40&t=16

Don't know about C# - As for LUA, it will be deprecated soon enough.