VehicleStuff.cs

namespace VehicleStuff
{
    public class Class1
    {
        public void DoSomething()
        {
            var myCar = new Car("Pontiac", "Firebird");
            var myBike = new Bike("Honda", "1984");
        }
    }

    public abstract class Vehicle
    {
        public enum DoorsEnum
        {
            Doors1,
            Doors2,
            Doors4,
            DoorsMany,
            DoorsNone
        }

        public enum WheelsEnum
        {
            Wheels1,
            Wheels2,
            Wheels3,
            Wheels4,
            Wheels6,
            Wheels8,
            WheelsMany,
            WheelsNone
        }

        public enum EngineTypeEnum
        {
            Gasoline,
            Diesel,
            Electric,
            Other
        }

        public DoorsEnum Doors { get; set; }
        public WheelsEnum Wheels { get; set; }
        public EngineTypeEnum Engine { get; set; }
        
        public Vehicle(DoorsEnum doors, WheelsEnum wheels)
        {
            Doors = doors;
            Wheels = wheels;
        }
    }

    public class Car : Vehicle
    {
        public Car() : base(DoorsEnum.Doors4, WheelsEnum.Wheels4)
        {
            
        }

        public Car(string make, string model) : this()
        {
            Make = make;
            Model = model;
        }

        public string Make { get; set; }
        public string Model { get; set; }
    }

    public class Bike: Vehicle
    {
        public Bike() : base(DoorsEnum.DoorsNone, WheelsEnum.Wheels2)
        {

        }

        public Bike(string make, string year) : this()
        {
            Make = make;
            Year = year;
        }

        public string Make { get; set; }
        public string Year { get; set; }
    }
}