public static void Main()
{
Derived1 d1 = new Derived1();
d1.Prop = 7;
Console.WriteLine(d1);
Base1 b1 = new Base1();
Console.WriteLine(b1);
Derived2 d2 = new Derived2();
Base2 b2 = new Base2();
d2.SetTheDude(77);
Console.WriteLine(d2.GetTheDude());
}
