3 public interface IVehicle {
9 public interface IWalker {
13 public class Base : IVehicle {
14 int IVehicle.Start () { return 1; }
15 public int Stop () { return 2; }
16 public virtual int Turn () { return 3; }
17 public int Walk () { return 1; }
20 public class Derived1 : Base {
21 // replaces Base.Turn + IVehice.Turn
22 public override int Turn () { return 4; }
25 public class Derived2 : Base, IVehicle {
26 // legal - we redeclared IVehicle support
27 public new int Stop () { return 6; }
28 // legal - we redeclared IVehicle support
29 int IVehicle.Start () { return 5; }
30 // replaces IVehicle.Turn
31 int IVehicle.Turn () { return 7; }
33 public override int Turn () { return 8; }
36 public class Derived3 : Derived1, IWalker {
42 Derived1 d1 = new Derived1 ();
43 Derived2 d2 = new Derived2 ();
44 Derived3 d3 = new Derived3 ();
47 Base rb = new Base ();
52 if (((IVehicle)d1).Turn () != 4)
55 if (((Base)d2).Turn () != 8)
58 if (((IVehicle)d2).Turn () != 7)
64 if (((IVehicle)b2).Turn () != 7)
67 if (((IVehicle)rb).Stop () != 2)
70 if (((IVehicle)d1).Stop () != 2)
73 if (((IVehicle)d2).Stop () != 6)
79 //Console.WriteLine ("TEST {0}", ((IVehicle)b2).Turn ());