Iterator blocks and inheritance

Question

Given a base class with the following interface:

public class Base
{
    public virtual IEnumerable GetListOfStuff()
    {
        yield return \"F         


        

Answer 1

How about:

public class Derived : Base
{
    public override IEnumerable GetListOfStuff()
    {
        return base.GetListOfStuff().Concat(GetMoreStuff());        
    }
    private IEnumerable GetMoreStuff()
    {
        yield return "Fourth";
        yield return "Fifth";
    }
}