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

It seems that one solution was to simply follow what the "manual" says: make a helper function.

So for now I've solved it like this:

public class Derived : Base
{
    private IEnumerable GetBaseStuff()
    {
        return base.GetListOfStuff();
    }

    public override IEnumerable GetListOfStuff()
    {
        foreach (string s in GetBaseStuff())
        {
            yield return s;
        }

        yield return "Fourth";
        yield return "Fifth";
    }
}

But I'm curious about other solutions as well, should they exist.