GroupShareKit is a client library targeting .NET 4.6 and above that provides an easy way to interact with GroupShare Rest API.
To use the GroupShareKit library, firstly you need to open Microsoft Visual Studio. Then you need to open the project where you want to use GroupShareKit. After you open the project, go to the Solution Explorer, right-click on the project References and select Manage Nuget packages. This will make a window open, click Browse, search for GroupShareKit and when you get the result just click the Install button. Now you're ready to use GroupShareKit library in your project.
GroupShareKit is open source and you can find the implementation here. Moreover, you can add a new feature or report a bug by using the issue tracker.