Creating a very simple linked list

A Linked List, at its core is a bunch of Nodes linked together.

So, you need to start with a simple Node class:

public class Node {
    public Node next;
    public Object data;
}

Then your linked list will have as a member one node representing the head (start) of the list:

public class LinkedList {
    private Node head;
}

Then you need to add functionality to the list by adding methods. They usually involve some sort of traversal along all of the nodes.

public void printAllNodes() {
    Node current = head;
    while (current != null) 
    {
        Console.WriteLine(current.data);
        current = current.next;
    }
}

Also, inserting new data is another common operation:

public void Add(Object data) {
    Node toAdd = new Node();
    toAdd.data = data;
    Node current = head;
    // traverse all nodes (see the print all nodes method for an example)
    current.next = toAdd;
}

This should provide a good starting point.

Based on what @jjnguy said, here's the full Console App example:

public class Node
{
    public Node next;
    public Object data;
}

public class LinkedList
{
    private Node head;

    public void printAllNodes()
    {
        Node current = head;
        while (current != null)
        {
            Console.WriteLine(current.data);
            current = current.next;
        }
    }

    public void AddFirst(Object data)
    {
        Node toAdd = new Node();

        toAdd.data = data;
        toAdd.next = head;

        head = toAdd;
    }

    public void AddLast(Object data)
    {
        if (head == null)
        {
            head = new Node();

            head.data = data;
            head.next = null;
        }
        else
        {
            Node toAdd = new Node();
            toAdd.data = data;

            Node current = head;
            while (current.next != null)
            {
                current = current.next;
            }

            current.next = toAdd;
        }
    }
}

class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine("Add First:");
        LinkedList myList1 = new LinkedList();
       
        myList1.AddFirst("Hello");
        myList1.AddFirst("Magical");
        myList1.AddFirst("World");
        myList1.printAllNodes();

        Console.WriteLine();

        Console.WriteLine("Add Last:");
        LinkedList myList2 = new LinkedList();

        myList2.AddLast("Hello");
        myList2.AddLast("Magical");
        myList2.AddLast("World");
        myList2.printAllNodes();

        Console.ReadLine();
    }
}