if (File.GetAttributes(FFName).ToString().IndexOf("ReadOnly") != -1) File.SetAttributes(FFName, FileAttributes.Normal); File.Delete(FFName);//不能刪除只讀文件

/// <summary>    ///  用來遍歷刪除目錄下的文件以及該文件夾    /// </summary>    public void DeleteFileByDirectory(DirectoryInfo info)    {      foreach (DirectoryInfo newInfo in info.GetDirectories())      {        DeleteFileByDirectory(newInfo);      }      foreach (FileInfo newInfo in info.GetFiles())      {        newInfo.Attributes = newInfo.Attributes &~(FileAttributes.Archive | FileAttributes.ReadOnly | FileAttributes.Hidden);        newInfo.Delete();      }      info.Attributes = info.Attributes & ~(FileAttributes.Archive | FileAttributes.ReadOnly | FileAttributes.Hidden);      info.Delete();    }