Incorrect return statement position (Chapter 15)

The example for default interface methods has return count; outside the declaration of the Count() method. It should instead be inside the using statement in that method. So the code should be:

public interface IEnumerable<T>
{
    IEnumerator<T> GetEnumerator();
    int Count()
    {
        using (var iterator = GetEnumerator())
        {
            int count = 0;
            while (iterator.MoveNext())
            {
                count++;
            }
            return count;
        }
    }
}