Is there any way in C# to enforce operator overloading in derived classes?

Question

I need to define an Interface which has to enforce certain operator overloading to the types which implements it. There doesn't seem an obvious way to do it since operator overloading has to be done using static methods in class. Is there any way to achieve the same effect (using abstract classes or anything else)?

Answer 1

Bit of a hack, but...

You could provide operator overloads in your base class that then call some published abstract methods in one of the classes to do the job there.

public abstract class MyClass
{
    public static MyClass operator +(MyClass c1, MyClass c2) 
    {
        return c1.__DoAddition(c2);
    }

    protected abstract MyClass __DoAddition(MyClass c2);
}