public GSM(string model, string manufacturer, decimal price, string owner, Battery battery, Display display) { this.model = model; this.manufacturer = manufacturer; this.price = price; this.owner = owner; this.battery = battery; this.display = display; this.callHistory = callHistory; }
public GSM(string model, string manufacturer, decimal price, string owner, Battery battery) : this(model, manufacturer, price, owner, battery, null) { }