C# 比较目录

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Collections;

namespace ConsoleApplication2
{
    class Program
    {
        static void ListDir(FileSystemInfo dir_info)
        {
            DirectoryInfo dir = dir_info as DirectoryInfo;
            if (dir != null)
            {
                FileSystemInfo[] files = dir.GetFileSystemInfos();
                for (int i = 0; i < files.Length; i++)
                {
                    FileInfo file = files[i] as FileInfo;
                    if (file != null)
                    {
                        Console.WriteLine(file.Directory.Name + " = " + file.Name + ‘ ‘ + file.Length);
                        
                        
                    }
                    else
                    {
                        //ListDir(files[i]);
                    }
                }
            }
        }

static void Main(string[] args)
        {
            string str = "20070529";
            IFormatProvider format = new System.Globalization.CultureInfo("zh-CN");
            string TarStr = "yyyyMMdd";

try
            {
                DateTime MyDate = DateTime.ParseExact(str, TarStr, format);
                Console.WriteLine("+++++ " + MyDate);

ArrayList strs = new ArrayList();

strs.Add(str);
                strs.Add("++++++++++++++");
                strs.Add(str);
                strs.Add("______________");
                strs.Add(str);
                strs.Add("---------------");
                strs.Add(str);

string[] strss = {"a", "b", "c", "d", "e", "f"};

string[] arrString = (string[])strs.ToArray(typeof(string));

File.WriteAllLines(@"C:\ddddddd6.txt", arrString);
                File.WriteAllText(@"C:\ddddddd2.txt", "===================");

FileInfo myFile = new FileInfo(@"C:\ddddddd3.txt");
                StreamWriter sw5 = myFile.CreateText();
                sw5.WriteLine("aaaaaa");
                sw5.WriteLine("aaaaaa");
                sw5.WriteLine("aaaaaa");
                sw5.WriteLine("aaaaaa");
                sw5.WriteLine("aaaaaa");
                sw5.Close();

FileStream fs1 = new FileStream(@"C:\ddddddd4.txt", FileMode.Create, FileAccess.Write);//创建写入文件
                StreamWriter sw = new StreamWriter(fs1);
                sw.WriteLine("aaaaaa");
                sw.WriteLine("aaaaaa");
                sw.WriteLine("aaaaaa");
                sw.WriteLine("aaaaaa");
                sw.WriteLine("aaaaaa");
                sw.Close();
                fs1.Close();
            }
            catch(Exception e)
            {
                Console.WriteLine(e.Message);
            }

while (true)
            {
                Console.Write("请输入要查询的目录:   ");
                string dirname = Console.ReadLine();
                if (dirname == " ")
                {
                    break;
                }
                DirectoryInfo dir_info = new DirectoryInfo(dirname);
                ListDir(dir_info);
            }                            
        }
    }
}