static void Main(string[] args)
{
Base b = new Base();
b.Execute();
b = new Derived();
b.Execute();
}
public static void Start()
{
Base b = new Base();
b.Execute(); // displays Base.Execute()
b = new Derived();
b.Execute(); // also displays Base.Execute() because not virtual/override
Derived d = new Derived();
d.Execute(); // displays Derived.Execute()
}