设计模式之工厂方法模式

abstract class MazeGame {

   private readonly IList<Room> _rooms = new List<Room>();
   
   protected MazeGame() {
      var room1 = this.MakeRoom();
      var room2 = this.MakeRoom();
      room1.Connect(room2);
      this.AddRoom(room1);
      this.AddRoom(room2);
   }

   private void AddRoom(Room room) {
      this._rooms.Add(room);
   }

   protected abstract Room MakeRoom();

}

class MagicMazeGame : MazeGame {

   protected override Room MakeRoom() {
      return new MagicRoom();
   }
}

class Room {

   private Room _next;

   public void Connect(Room other) {
      this._next = other;
   }
}

class MagicRoom : Room {
   
}

class Program {
   
   static void Main(string[] args) {

      MazeGame game = new MagicMazeGame();

      Console.ReadKey();
   }
}