This is a small library that makes loading native libraries very easy across all platforms. It also provides the PathInfo and PathPlatformInfo classes which make it easy to configure different library paths depending on the platform being used.
A library can be loaded with NativeLibrary.Load(string path, params string[] preload), where path is the path to the main library, and preload is a list of other paths to other libraries that need to be loaded before the first library to be able to be loaded. You could also do this in individual NativeLibary.Load(...) calls, but this just does that for you. It is by no means necessary or any different.
You can then retrieve the native functions by calling the GetFunction<IDelegate>(string function_name) method, with function_name being the function entry point in the library, and IDelegate being the delegate that represents the function in C#.