static IList<int> Merge (IList<int> xs, IList<int> ys) { IList<int> zs = new List<int>(); IEnumerator<int> xi = xs.GetEnumerator(); IEnumerator<int> yi = ys.GetEnumerator(); bool xgo = xi.MoveNext(); bool ygo = yi.MoveNext(); // FIXME while (xgo && ygo) { if (xi.Current < yi.Current) { zs.Add(xi.Current); xgo=xi.MoveNext(); } else { zs.Add(yi.Current); ygo=yi.MoveNext(); } } return zs; }Übungen: