How can I implement static methods on an interface?

Question

I have a 3rd party C++ DLL that I call from C#.

The methods are static.

I want to abstract it out to do some unit testing so I created an interface with the

Answer 1

C# 8 Allows Static Members on Interfaces

Beginning with C# 8.0, an interface may define a default implementation for members. It may also define static members in order to provide a single implementation for common functionality.

interface (C# Reference)

E.g.

public interface IGetSomething
{
    public static string Something = "something";
}

var something = IGetSomething.Something;