Casting between two types derived from the (same) interface

Question

I have an interface and two types that derive from it.

However, I cannot do the following:

B objectB = (B) objectA

Where B derives

Answer 1

Imagine the following setup:

public interface Human
{
    bool Male { get; }
}

public class Man : Human
{
    public bool HasABeard { get { return true; } }

    public bool IsMale { get { return true; } }
}

public class Woman : Human
{
    public bool IsMale { get { return false; } }

    public List> Shoes { get; set; }
}

What would you expect the compiler to produce from the following code? What will the output be?

Man a;
Woman b = new Woman();
a = (Man)b;

Console.WriteLine(a.HasABeard ? "Beard ON" : "Beard OFF");