C# Static method in interface cannot be accessed from the implementing class

Question

The method SomeStaticMethod from interface IA is not directly accessible from the class A that implemented the interface. Am I missing something?

public interface IA {
    public static int SomeStaticMethod() => 4;    
}

public class A : IA {
    public static void Bidule() {
        SomeStaticMethod(); //DO NOT COMPILE
        IA.SomeStaticMethod(); //COMPILES
    }
}

If the interface IA is changed to a class, it works.

public class IA {
    public static int SomeStaticMethod() => 4;    
}

public class A : IA {
    public static void Bidule() {
        SomeStaticMethod(); //NOW it works
    }
}

Answer 1

A class can implement multiple interfaces. If you defined a static method with the same signature in both interfaces, the compiler couldn't decide which of those should be invoked. It's one of the (many) reasons why most OO languages try to avoid multiple-inheritance, useful as it can be.