static void Run(string[] args)
{
CarFactory buildCar = BuildCar; // covariance, using more derived type for return value
Car bmwX5 = buildCar("BMW X5");
bmwX5.Display();
PrintBMWInfo getCarInfo = GetCarInfo; // contrvariance, using more generic type that was specified for passing argument
getCarInfo((BMW)bmwX5);
}
static void Main(string[] args)
{
CarFactory buildCar = BuildCar; // covariant assign
Car bmwX5 = buildCar("BMW X5");
bmwX5.Display();
PrintBMWInfo getCarInfo = GetCarInfo; // contrvariant assign
getCarInfo((BMW)bmwX5);
}
