// CS1540: Cannot access protected member `A.Test(int)' via a qualifier of type `B'. The qualifier must be of type `C' or derived from it // Line: 28 using System; public abstract class A { protected virtual void Test (int a) { } public void Test () { } } public class B : A { protected override void Test (int a) { base.Test (a); } } public class C : A { private B B; protected override void Test (int a) { B.Test (a); base.Test (a); } } class X { static void Main () { } }