File References Needed for IBO for .NET project

I am trying to upgrade our existing applications after upgrading imis to 20.2.65.9655.

I have started a brand new project in Visual Studio. Used the WebAPI2 template. Framework 4.6.2.

I am trying to determine which Asi, or related, dlls that I need to reference for my project. As I keep adding references, I keep getting errors about missing references. As soon as I solve one, I get another. I just spoke with an Imis guy and he mentioned that I should only need a few since I'm just using IBOs.

It would also be nice to know the minimum configuration necessary in the web.config.

Any thoughts?