Question

I have the following inheritance structure:

interface A
{ 
   void Foo();
}
interface B : A
{
}

And I realise that the only places where Foo() is actually implemented (i.e., not empty) is in the classes which are implementing B.

If I move Foo from A to B, will I have to recompile all those implementing classes, and, more importantly, what about all the assemblies which are using those implementations?

(I know I can just try this myself, and see, but I’d also like some ‘insight’ into what’s happening)

Answer 1

The interface definition will be changing in a non backward compatible way, so you will have to recompile other assemblies as well, and if some code is calling Foo on A objects, you will have to rewrite that part of code as well.