public GSM(string model, decimal price, Battery battery, TelephoneScreen screen, string manufacturer, string owner)
{
this.Model = model;
this.Price = price;
this.Battery = battery;
this.Screen = screen;
this.Manufacturer = manufacturer;
this.Owner = owner;
this.CallHistory = new List <Call>();
}
public GSM(string model, decimal price, Battery battery, TelephoneScreen screen, string manufacturer)
: this(model, price, battery, screen, manufacturer, null)
{
}
public GSM(string model, decimal price, Battery battery, TelephoneScreen screen)
: this(model, price, battery, screen, null, null)
{
}
