Category "interface"

Is it OK to add default implementations to methods of an interface which represents a listener?

There is a certain library I use in my project. This library has an interface which has about 15 methods. The purpose of this interface is to make it possible

Should callers of an interface (need to) make assumptions about the underlying implementation?

I understand the benefit of Programming to an Interface and the benefit of using an Interface for the return type of a method: public List<Integer> getUs

Interfaces — What's the point?

The reason for interfaces truly eludes me. From what I understand, it is kind of a work around for the non-existent multi-inheritance which doesn't exist in C#

how do i return this instance of the IInfocard interface?

i am currently trying to return a instance of the Iinforcard interface within my "createNewInfocard" function, however i keep running into error CS0266. i am un

Is it possible to superimpose an interface on an external class in C#?

In order to hide the concrete implementation of a class behind an interface, for example for dependency injection, I find it is useful to extract an interface w