public interface IA<T>{}public class G<U, V> : IA<G<V,string>>{}public class C
{static bool Test_2 <T2>(T2[] t){return t is byte[];}public static intMain(){
G<long,short> p =new G<long,short> ();if(p is IA<G<string,string>>)return1;if(Test_2(new int[0]))return2;if(!Test_2(new byte[0]))return3;return0;}}