public void AddAirConditioner(AirConditioner airConditioner) { var isDublicate = this.airConditioners.Any( c => c.Model == airConditioner.Model); if (isDublicate) { throw new ArgumentException(Constants.Duplicate); } else { this.airConditioners.Add(airConditioner); } }
public void RemoveAirConditioner(AirConditioner airConditioner) { this.airConditioners.Remove(airConditioner); }