ProviderAPI

From APIDesign

Rules for extending API designed for implementors are very different to those for API that can only be called. In case you have a provider implementing your interface, the obvious expectation of that person seems to be that the once provided implementation, written and potentially compiled once in a time, will continue to work forever.

The easiest way to break this promise is to add new non-implemented methods into the type. As such do not add new methods to interfaces or abstract classes implemented by some providers. This immediately breaks the promise of source BackwardCompatibility.

TBD: Fragile methods additions

TBD: Interfaces and clear definition of a version