C#实现安全删除文件目录的方法

using System;
using System.IO;
namespace Retry
{
 class Program
 {
 static void Main(string[] args)
 {
  DirectoryInfo dirInfo = Directory.CreateDirectory(@"C:\TestDir");
  string folderName = System.Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) + "\\TestDir";
  if (!Directory.Exists(folderName))
  {
  Directory.CreateDirectory(folderName);
  Console.WriteLine("{0} created! ",folderName);
  }
  int retryTimes = 1;
  do
  {
  if (Directory.Exists(folderName))
  {
   try
   {
   Console.WriteLine("Tring to delete file the {0} time.",retryTimes);
   Directory.Delete(folderName, true);
   Console.WriteLine("Deleting file successfully.");
   break;
   }
   catch (IOException ex)
   {
   Console.WriteLine("Exception! ", ex.ToString());
   Console.WriteLine("Sleep 5 seconds and retry.");
   System.Threading.Thread.Sleep(5000);
   retryTimes++;
   }
  }
  else
  {
   Console.WriteLine("Delete folder successfully");
   break;
  }
  } while (retryTimes <= 5);
  if (Directory.Exists(folderName))
  Console.WriteLine("Deleting folder failed.");
  Console.WriteLine("Done");
  Console.ReadKey();
 }
 }
}