static void OverrideVirtualMethods()
{
// Override two virtual methods
// Create animal objects and instantiate concrete animals
Parrot parrot = new Parrot();
Console.WriteLine(parrot.Fly());
Toucan toucan = new Toucan();
Console.WriteLine(toucan.Fly());
Krill krill = new Krill();
Console.WriteLine(krill.BeEaten());
Langostino langostino = new Langostino();
Console.WriteLine(langostino.BeEaten());
}
public void TestKrill()
{
Krill krill = new Krill();
Assert.Equal("Krill are food for whales!", krill.BeEaten());
}