>Having an interface inheriting from another is your choice. You might have a IFileSend interface. And when you designed it Email was the only requirement. Now certain classes will need to be FTP'ed.
>
>I've seen it both ways, where the author created another interface IFileSendFTP and either inherited the IFileSend interface, so your classes only needed to implement the IFileSendFTP. Or the interfaces were kept separate and the classes implemented both.

Perry, anything that implemented the IFileSendFTP would still need to implement the interface of the IFileSend as well. Otherwise, what's the point of inheriting IFileSend?

~~Bonnie