子類中的建構函式

當你建立基類的子類時，可以在子類建構函式的引數之後使用: base 構造基類。

class Instrument
{
    string type;
    bool clean;

    public Instrument (string type, bool clean)
    {
        this.type = type;
        this.clean = clean;
    }
}

class Trumpet : Instrument
{
    bool oiled;

    public Trumpet(string type, bool clean, bool oiled) : base(type, clean)
    {
        this.oiled = oiled;
    }
}