Unmanaged Exports not creating a .lib file

Question

I am trying to create an example of exporting a simple function from a managed C# class library and use it in an unmanaged C++ console application.

I'm using Robert Giesecke's Unmanaged Exports for this. (IDE is Visiual Studio 2017)

My Code on the managed side of things is:

using RGiesecke.DllExport;
using System.Runtime.InteropServices;

namespace ManagedCodeDll
{
    public class Calculator
    {
        [DllExport(CallingConvention = CallingConvention.Cdecl)]
        static public int Add(int a, int b)
        {
            return a + b;
        }           
    }

}

The Build Platform target is set to x86.

But when building the project no .lib file is created. Only the dll itself.

From what I understand is that I need the lib file for the linker setting on the unmanaged side.

What am I doing wrong? Can someone help me?