private static void Main() { var linkedList = new SinglyLinkedList <int>(); linkedList.AddFirst(2); linkedList.AddFirst(1); linkedList.AddFirst(0); linkedList.AddFirst(-1); Console.WriteLine(linkedList); linkedList.Insert(0, 4); Console.WriteLine(linkedList); linkedList.RemoveFirst(); Console.WriteLine(linkedList); Console.WriteLine(linkedList.GetFirst()); }