public Gsm(string manufacturer, int price = 0, string owner = null, Battery battery = null, Display display = null, Gsm iphone = null)
{
this.Manufacturer = manufacturer;
this.Price = price;
this.Owner = owner;
this.Battery = battery;
this.Display = display;
}
// You can play around with the code to test its functionality.
static void Main()
{
Gsm gsm = new Gsm("iphone");
Gsm gsm1 = new Gsm("iphon3");
Gsm gsm2 = new Gsm("iphone2");
GsmTest gsmtest = new GsmTest(new List<Gsm>() { gsm, gsm1, gsm2 });
gsmtest.GetInfoForIPhone();
}
