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
>