App.xaml.cs

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Threading.Tasks;
using System.Windows;

using ToastNotifications;
using ToastNotifications.Lifetime;
using ToastNotifications.Position;

namespace JsonReaderDima
{
    /// <summary>
    /// Interaction logic for App.xaml
    /// </summary>
    public partial class App : Application
    {

        public App()
        {

            DataStore e = new DataStore();
            DependencyService.Register<DataStore>(e);

            /* * */
            Notifier notifier = new Notifier(cfg =>
            {
                cfg.PositionProvider = new WindowPositionProvider(
                    parentWindow: Application.Current.MainWindow,
                    corner: Corner.TopRight,
                    offsetX: 10,
                    offsetY: 10);

                cfg.LifetimeSupervisor = new TimeAndCountBasedLifetimeSupervisor(
                    notificationLifetime: TimeSpan.FromSeconds(3),
                    maximumNotificationCount: MaximumNotificationCount.FromCount(5));

                cfg.Dispatcher = Application.Current.Dispatcher;

            });

            DependencyService.Register<Notifier>(notifier);
        }



    }
}