public override void Remove(SafeFolder folder) { Console.WriteLine("文件或者文件夹已经删除成功"); }
//删除文件夹或者文件 public abstract void Remove(SafeFolder folder);
public override void Add(SafeFolder folder) { Console.WriteLine("文件或者文件夹已经增加成功"); }
//增加文件夹或文件 public abstract void Add(SafeFolder folder);