using System;

​

public class Program

{

    class node

    {

        internal object data;

        internal node next;

    }

​

    class linkedlist

    {

        static internal node pointer;

        public static void insert(string data = null) //insert method

        {

            node newNode = new node();

            newNode.data = data;

            if (linkedlist.pointer == null)

            {

                linkedlist.pointer = newNode;

            }

            else

            {

                newNode.next = linkedlist.pointer;

                linkedlist.pointer = newNode;

            }

        }

​

        public static void peek() //peek methoid for testing purposes

        {

            if (linkedlist.pointer == null)

            {

                Console.WriteLine("No items in linked list");

            }

            else

            {

                Console.WriteLine(linkedlist.pointer);

            }

        }

    }

​

    public static void Main()

    {

        linkedlist.insert("hello");

        linkedlist.peek();

    }

}