CarouselView.HomePage.cs

public HomePage(CarouselLayout.IndicatorStyleEnum indicatorStyle)
{
    _indicatorStyle = indicatorStyle;

    viewModel = new SwitcherPageViewModel();
    BindingContext = viewModel;

    Title = _indicatorStyle.ToString();

    relativeLayout = new RelativeLayout 
    {
        HorizontalOptions = LayoutOptions.FillAndExpand,
        VerticalOptions = LayoutOptions.FillAndExpand
    };

    var pagesCarousel = CreatePagesCarousel();
    var dots = CreatePagerIndicatorContainer();
    var tabs = CreateTabs();

    switch(pagesCarousel.IndicatorStyle)
    {
        case CarouselLayout.IndicatorStyleEnum.Dots:
            relativeLayout.Children.Add (pagesCarousel,
                Constraint.RelativeToParent ((parent) => { return parent.X; }),
                Constraint.RelativeToParent ((parent) => { return parent.Y; }),
                Constraint.RelativeToParent ((parent) => { return parent.Width; }),
                Constraint.RelativeToParent ((parent) => { return parent.Height/2; })
            );

            relativeLayout.Children.Add (dots, 
                Constraint.Constant (0),
                Constraint.RelativeToView (pagesCarousel, 
                    (parent,sibling) => { return sibling.Height - 18; }),
                Constraint.RelativeToParent (parent => parent.Width),
                Constraint.Constant (18)
            );
            break;
        case CarouselLayout.IndicatorStyleEnum.Tabs:
            var tabsHeight = 50;
            relativeLayout.Children.Add (tabs, 
                Constraint.Constant (0),
                Constraint.RelativeToParent ((parent) => { return parent.Height - tabsHeight; }),
                Constraint.RelativeToParent (parent => parent.Width),
                Constraint.Constant (tabsHeight)
            );

            relativeLayout.Children.Add (pagesCarousel,
                Constraint.RelativeToParent ((parent) => { return parent.X; }),
                Constraint.RelativeToParent ((parent) => { return parent.Y; }),
                Constraint.RelativeToParent ((parent) => { return parent.Width; }),
                Constraint.RelativeToView (tabs, (parent, sibling) => { return parent.Height - (sibling.Height); })
            );
            break;
        default:
            relativeLayout.Children.Add (pagesCarousel,
                Constraint.RelativeToParent ((parent) => { return parent.X; }),
                Constraint.RelativeToParent ((parent) => { return parent.Y; }),
                Constraint.RelativeToParent ((parent) => { return parent.Width; }),
                Constraint.RelativeToParent ((parent) => { return parent.Height; })
            );
            break;
    }

    Content = relativeLayout;
}

CarouselLayout CreatePagesCarousel ()
{
    var carousel = new CarouselLayout {
        HorizontalOptions = LayoutOptions.FillAndExpand,
        VerticalOptions = LayoutOptions.FillAndExpand,
        IndicatorStyle = _indicatorStyle,
        ItemTemplate = new DataTemplate(typeof(HomeView))
    };
    carousel.SetBinding(CarouselLayout.ItemsSourceProperty, "Pages");
    carousel.SetBinding(CarouselLayout.SelectedItemProperty, "CurrentPage", BindingMode.TwoWay);

    return carousel;
}