// CS1540: Cannot access protected member `AAttribute.AAttribute(int)' via a qualifier of type `AAttribute'. The qualifier must be of type `BAttribute' or derived from it // Line: 17 using System; public class AAttribute : Attribute { public AAttribute () { } protected AAttribute (int a) { } } [AAttribute (5)] public class BAttribute : AAttribute { public BAttribute () : base () { } public BAttribute (int a) : base (a) { } }