static void Main(string[] args)
{
// TODO: Declare and initialize a CD and a DVD object.
// TODO: Call each CD and DVD method to verify that they work as expected.
CD cd = new CD("Johnny Cash", "CD");
cd.SpinDisk();
((IDisk)cd).ReadableByLaser();
((IDisk)cd).DiskSize();
cd.DataWrittenByLaser();
((IDisk)cd).DiskMaterial();
cd.StoreData();
DVD dvd = new DVD("Shrek", "DVD", 8);
dvd.SpinDisk();
((IDisk)dvd).ReadableByLaser();
((IDisk)dvd).DiskSize();
dvd.DataWrittenByLaser();
((IDisk)dvd).DiskMaterial();
dvd.StoreData();
}