Linked list problem with remove, C#

Linked list problem with remove

//Linked list problem
//Rextester.Program.Main is the entry point for your code. Don't change it.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        // main
        public static void Main(string[] args)
        {
            //Your code goes here
            //Console.WriteLine("Hello, world!");
            
            LinkedList myList = new LinkedList();
            myList.AddHead(null);
            
            Console.WriteLine(myList.Length().ToString());
        }
        
        // ListNode class - contains the data, and the next pointer
        public class ListNode
        {
            public object Data {get;set;}
            public ListNode Next {get;set;}
        }
        
        // The LinkedList class
        public class LinkedList
        {
            // The head of the list
            public ListNode Head {get;set;}
            
            // The LinkedList constructor
            public LinkedList()
            {
            }
            
            // Add a node to the head of the list with
            // the data
            public bool AddHead(object data)
            {
                return false;
            }
            
            /// <summary>
            /// Remove the node corresponding to the number passed in
            /// ** zero based index **
            /// </summary>
            /// <param name="nodeNumber"></param>
            /// <returns></returns>
            public bool RemoveNode(int nodeNumber)
            {
                bool removed = false;
    
                return removed;
            }
              
            // Return the length of the list
            public int Length()
            {
                int length = 0;
                ListNode thisNode = Head;
                
                if(thisNode != null)
                {
                    while(thisNode.Next != null)
                    {
                        length++;
                        thisNode = thisNode.Next;
                    }
                }
                
                return length;
            }
        }
    }
}


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