C# 删除文件夹

  public void DeleteFolder(string deleteDirectory)   {       if (Directory.Exists(deleteDirectory))       {           foreach(string deleteFile in Directory.GetFileSystemEntries(deleteDirectory))           {               if(File.Exists(deleteFile ))                   File.Delete(deleteFile );               else                   DeleteFolder(deleteFile );            }           Directory.Delete(deleteDirectory);        }   }