5 public static void Main ()
7 var vtib = new VTI_C<int> ();
8 var result = vtib.GRAF<int> ();
10 Console.WriteLine ("It works");
15 public abstract class VTIB
17 public abstract bool GRAF<K>();
21 public class VTI<T> : VTIB
23 public override bool GRAF<K>() {
28 public class VTI_C<T> : VTI<T>