PocketBook/src/BookApp/ContentView/ContentCollection.xaml.cs

using System.Collections.ObjectModel;
using System.Globalization;
using static BookApp.MainPage;

namespace BookApp
{
    public partial class ContentCollection : ContentView
    {
        public static readonly BindableProperty ItemsSourceProperty =
             BindableProperty.Create(nameof(ItemsSource), typeof(ObservableCollection<ObjetTemp>), typeof(ContentCollection));

        public ObservableCollection<ObjetTemp> ItemsSource
        {
            get { return (ObservableCollection<ObjetTemp>)GetValue(ItemsSourceProperty); }
            set { SetValue(ItemsSourceProperty, value); }
        }

        public ContentCollection()
        {
            InitializeComponent();
            BindingContext = this;
        }
    }
}