Game API Referencing in VS

File Locations
The referenced files may be anywhere on your computer, it is however recommended to either have them in your visual Studios folder, or in the project's folder.

Referencing
In the menu, go to 'Project' > 'Add Reference'

This will open a window.

In this window, click 'Browse'

Locate the files neccessary.

protobuf-net.dll :
Required file

-Locate your Empyrion folder (normal)

-Folder: Empyrion_data

-Folder: Managed

-Locate file here

Mif.dll :
Required file

-Locate your Empyrion folder (normal)

-Folder: Empyrion_data

-Folder: Managed

-Locate file here

Assembly-CSharp-firstpass :
File to use YAML files

-Locate your Empyrion folder (normal)

-Folder: Empyrion_data

-Folder: Managed

-Locate file here

YamlDotNet :
Refer to this article