//基底類別(父類別)
public class Otaku
{
    //欄位
    public int weight, height;
    //建構子
    public Point(int weight, int height)
    {
        this.weight = x;
        this.height = y;
    }
}

//衍生類別(子類別)
public class IdolOtaku : Otaku{
  //欄位
  public string oshiMem;
  //建構子
  public IdolOtaku(int weight,int height,string oshiMem) :
    //繼承自父類別的建構子並將所需要的引數傳遞過去
    base(weight,height)
  {
    this.oshiMem = oshiMem;
  }

}

//宣告三個實體
Otaku achan = new Otaku(100, 200);
IdolOtaku asurin = new IdolOtaku(10, 20, "yukka");

//可以用基底類別的名稱來宣告變數
//但new 後面必須使用衍生類別的名稱
Otaku momoko = new IdolOtaku(10, 20, "nanase");