More about Virtual / new…plus interfaces!

Question

Yesterday I posted a question about the new/virtual/override keywords, and i learned a lot from your answers. But still i remain with some doubts.

In between all the

Answer 1

From what I understand you're asking, given a subclass with some overridden methods, how to know which method will get called.

basically, there are 3 options I can think of:

1. If SubClass does not define a method on BaseClass, then BaseClass's method will get called
2. If SubClass OVERRIDES a method on BaseClass, then the SubClass's method will get called
3. If SubClass defines a NEW method which ALSO exists on BaseClass, then the method to get called will depend on the REFERENCE to the object (whether your variable is typed as BaseClass or SubClass)

I hope I understood your question

edit: a quick note about interfaces: If BaseClass implements IInterface, then SubClass, which derives from BaseClass, already has the implementation of IInterface and does not need to re-implement it. E.g. if there's an IVehicle with an MPH property, and there's a BaseVehicle that implements that, since Car derives from BaseVehicle, Car already has an MPH property