We include the C# wrapper files with the Windows API download.
This is made to be a straight wrapper with almost identical functionality as the C++ API’s.
So the standard docs will still be relevant:
https://fmod.com/resources/documentation-api#/
At this point we don’t have any specific examples for C# outside of Unity, but you should be able to use the Unity integration as a guide.
https://fmod.com/resources/documentation-api?page=content/generated/engine_new_unity/script_example_basic.html#/