This page covers a topic not yet activated in BallisticNG.
About the API Edit
BallisticNG allows you to add new gamemodes and weapons into the game through an Application Programming Interface. The game can compile C# code to generate DLL files or load DLL files you have compiled yourself.
If you use the API it is recommended that you use an IDE such as Visual Studio, this will allow you to include the game's DLLs into your IDE's solution which will give you hints and suggestions based on what it can find inside them.