Why can't I have protected interface members?

Question

What is the argument against declaring protected-access members on interfaces? This, for example, is invalid:

public interface IOrange
{
    public OrangePee         


        

Answer 1

Because it makes no sense. An interface is a publicly exposed contract. I am an IThing, therefore I will perform IThing methods if asked. You can't ask an IThing to confirm it performs methods it can't tell you about.