public string Make {get;set;}
public string Model {get;set;}
public string SerialNum {get;set;}
public Vehicle(string make, string model, int price, string serialnum)
public virtual string DisplayInfo()
public bool VerifySerialNum()
if (SerialNum.StartsWith("A1") == true)
public class Car : Vehicle{
public int SeatCapacity{get;set;}
public Car(string make, string model, int price, string serialnum, int seatcapacity) : base (make, model, price, serialnum)
SeatCapacity = seatcapacity;
public override string DisplayInfo()
else if (SeatCapacity >= 4)