Call a method that requires a derived class instance typed as base class in vb.net or c?

A way around it is to insert MyActualFunction as a class member.

Polymorphism can't help you with that therefore you'll have to create a common method with both parameters of type Shape and then distinguish them inside it.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.