Separating implementation and interface: HOW?

[Luc Kumps]

static void Main(string[] args)
{
IB b = A.BFactory.Create(null);
IC c = A.CFactory.Create(null);

Yes, this is the solution we ended up implementing: creating (in Main) the
interface references for all the factories that will ever be needed by one
of the projects. Initially, I was looking for a way to create "b" from
Project B and "c" from project C automatically at startup of the program: I
was trying to make each implementation resposible for creating a reference
to its factory...
But if that isn't possible in C#, then the above work-around will do just
fine!

Thanks for your assistance!

Luc K