iterator coroutine.cs

var source = new int[3, 4] { { 1, 2, 3, 4 }, { 5, 6, 7, 8 }, { 9, 10, 11, 12 } };
var destination = new int[6, 2];
var coordinator = new Coordinator<int[]>(
    new Func<Coordinator<int[]>, IEnumerator>[] {

        // Curry coroutine into common "shape"
        c => Producer.Coroutine(source, c),
        Exponentiator.Coroutine,
        c => Consumer.Coroutine(destination, c)
    }
);
coordinator.Execute();