1 // CS0312: The type `E?' cannot be used as type parameter `T' in the generic type or method `C<System.Enum>.Foo<T>(T)'. The nullable type `E?' does not satisfy constraint `System.Enum'
10 static void Foo<T> (T value) where T : U
14 static void Test (E? s)
16 C<System.Enum>.Foo (s);