// TODO test it static bool CheckIfLinkedListHasLoop(Node head) { Node tempNode = head; Node tempNode1 = head.Next; while (tempNode != null && tempNode1 != null) { if (tempNode.Equals(tempNode1)) { return(true); } if ((tempNode1.Next != null) && (tempNode.Next != null)) { tempNode1 = tempNode1.Next.Next; tempNode = tempNode.Next; } else { return(false); } } return(false); }