public class WithArgumentsSetterImplicitDefault {
     public IContainer Container;

     public WithArgumentsSetterImplicitDefault() {
          Container = new Container(x => {
                                      x.For<IClass1>().Use<Class1>();
                                      x.For<IClassA>().Use<ClassA>()
                                             .Ctor<int>().Is(5)
                                             .Setter<Class1>().IsTheDefault();
                                             });
    }
}