static void Main(string[] args)
{
Animal animal = new Animal();
animal.IsAlive = true;
animal.Name = "Matti";
animal.Age = 7;
Cat cat = new Cat();
cat.Bell = false;
cat.Stripes = false;
animal.AddCat(cat);
animal.AddCat(cat);
Console.WriteLine(animal.ToString());
// cat.PrintData();
}
public void AddCat(Cat cat)
{
Cats.Add(cat);
}