public IEnumerable <Node <int> > LinkedLists()
{
yield return(MyLinkedList <int> .GenerateLinkedList(new int[] { 1, 7, 4, 1, 1, 6 }).Head);
}
public IEnumerable <object[]> LinkedLists()
{
var head = MyLinkedList <int> .GenerateLinkedList(new int[] { 1, 7, 4, 1, 1, 6 }).Head;
yield return(new object[] { head, 3 });
}