This is a bit of a convoluted question, hopefully I can make it clear.

I am finding that this may not be possible, but am trying to see if anybody has a solution.

I have four classes, two are core classes and two are those core classes extended:

extUser Extends coreUser
extSecurity Extends coreSecurity

In the constructor for coreUser you have this:

public coreUser(string id, ref coreSecurity cs)

When trying to extend coreUser you would have this:

public extUser(string id ref extSecurity es) : base(id, ref es)

This fails because es is of type, extSecurity and the base class expects a type of coreSecurity. I've not found anyway to cast this to allow for me to override this base class in C#. In VB it works just fine.

Ideas?