static void doWork()
{
// TODO:
Console.WriteLine("Journey by airplane:");
Airplane myPlane = new Airplane();
myPlane.StartEngine("Contact");
myPlane.TakeOff();
myPlane.Drive();
myPlane.Land();
myPlane.StopEngine("Whirr");
Console.WriteLine("\nJourney by car:");
Car myCar = new Car();
myCar.StartEngine("Brm");
myCar.Accelerate();
myCar.Drive();
myCar.Brake();
myCar.StopEngine("Phut");
Console.WriteLine("\nTesting polymorphism");
Vehicle v = myCar;
v.Drive();
v = myPlane;
v.Drive();
}
