gistfile1.cs

    public abstract class JSNode {
        public virtual IEnumerable<JSNode> Children {
            get {
                yield break;
            }
        }

        public IEnumerable<JSNode> AllChildrenRecursive {
            get {
                foreach (var child in Children) {
                    yield return child;

                    foreach (var subchild in child.AllChildrenRecursive)
                        yield return subchild;
                }
            }
        }
    }