How to set the space/gap between selected and unselected items

public partial class KBSolutionPage : ContentPage
{
public KBSolutionPage()
{
    InitializeComponent();
 
    //Initialize the carousel control
 
    SfCarousel sfCarousel = new SfCarousel();
 
    if (Device.OS == TargetPlatform.Android)
    {
        sfCarousel.ItemWidth = 170;
        sfCarousel.ItemHeight = 250;
    }
    if (Device.OS == TargetPlatform.iOS)
    {
        sfCarousel.ItemWidth = 150;
        sfCarousel.ItemHeight = 300;
    }
 
    // SelectedItemOffset: to determine the space between the selected and unselected
    sfCarousel.SelectedItemOffset = 40;
 
    var carouselModel = new List<CarouselModel> {
            new CarouselModel ("image1.png"),
            new CarouselModel ("image2.png"),
            new CarouselModel ("image3.png"),
            new CarouselModel ("image4.png"),
            new CarouselModel ("image5.png")
        };
    var carouselModel DataTemplate = new DataTemplate(() =>
    {
        var grid = new Grid();
        var nameLabel = new Image();
        nameLabel.SetBinding(Image.SourceProperty, "Image");
        grid.Children.Add(nameLabel);
        return grid;
    });
 
    //Set the collection of required view into carousel's datasource
 
    sfCarousel.ItemTemplate = carouselModel DataTemplate;
    sfCarousel.DataSource = carouselModel;
 
    this.Content = sfCarousel;
}
}
 
public class CarouselModel
{
public CarouselModel(string imagestr)
{
    Image = imagestr;
}
private string _image;
 
public string Image
{
    get { return _image; }
    set { _image = value; }
}
}