C#获取指定目录最后写入时间的方法

using System;using System.IO;class MainClass { static void Main(string[] args) {  FileInfo file = new FileInfo("c://a.txt");  // Display directory information.  DirectoryInfo dir = file.Directory;  Console.WriteLine("Checking directory: " + dir.Name);  Console.WriteLine("In directory: " + dir.Name);  Console.Write("Directory exists: ");  Console.WriteLine(dir.Exists.ToString());  if (dir.Exists) {   Console.Write("Directory last updated: ");   Console.WriteLine(dir.LastWriteTime.ToString());  }  Console.WriteLine(); }}