Interfacing External Module with Dragonboard 410c

I am working with dragonboard 410c on windows 10 IOT Platform using C# for application development.
currently, I am trying to integrate Redpine RS9116W Bluetooth 5.0 Module with dragon board. for which, I tested the initial communication setup using SPI and its working fine.
To integrate more with the module, Redpine is providing set of HAL API files and examples. All the files are written in C.
Since I am using C# for my application development, I need a solution to port the provided HAL API with my application. Is there any easiest way to do this?

Well, I’m not too familiar with Windows and C#, but I think the following could help: