static void Main(string[] args)
{
/*
* Animal animal = new Animal();
* animal.Sound();
*/
Animal dog = new Dog();
dog.Sound();
Cat cat = new Cat(10);
Console.WriteLine(cat.Age()); //overloading
Console.WriteLine(cat.Age(10));
//using properties
cat.Color = "black"; //set
Console.WriteLine("The color of the cat is: " + cat.Color); //get
}