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(); }