public ArrayList Search(MandolinSpec searchGuitar)
{
ArrayList matchingMandolin = new ArrayList();
foreach (var instrument in _inventory)
{
Mandolin mandolin = (Mandolin)instrument;
if (mandolin.Spec.Matches(searchGuitar))
{
matchingMandolin.Add(mandolin);
}
}
return(matchingMandolin);
}
public void AddInstrument(String serialNumber, double price, InstrumentSpec spec)
{
Instrument instrument = null;
if (spec is GuitarSpec)
{
instrument = new Guitar(serialNumber, price, (GuitarSpec)spec);
}
else if (spec is MandolinSpec)
{
instrument = new Mandolin(serialNumber, price, (MandolinSpec)spec);
}
_inventory.Add(instrument);
}