public GSM(string model, string manufacturer, decimal?price, string owner, Battery battery, Display display) : this(model, manufacturer)
{
Price = price;
Owner = owner;
Display = display;
Battery = battery;
}
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;
CallsHistory = new List <Calls>();
}
