//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
namespace Rextester
{
public class List
public Node head;
public Node tail;
public int count;
public class Node
public int Data
{get; set;}
public Node Next
public Node Prev
public Node(int data)
this.Data = data;
Next = null;
Prev = null;
}
public List()
this.head = null;
this.tail = null;
this.count = 0;
public class Program
public static void Main(string[] args)
//Your code goes here
Console.WriteLine("Hello, world!");