cs

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.WindowManagement;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Hosting;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Media.Imaging;
using Windows.UI.Xaml.Navigation;

namespace Nazwiska
{
    public sealed partial class MainPage : Page
    {
        ObservableCollection<Osoba> osoba = new ObservableCollection<Osoba>();
        public MainPage()
        {
            this.InitializeComponent();
            osoba.Add(new Osoba("Bartek", "Chwyć", "Biała Podlaska", "ms-appx:///Assets//Bartek.png"));
            osoba.Add(new Osoba("Marian", "Marczuk", "Biała Podlaska", "ms-appx:///Assets//Marian.png"));
            osoba.Add(new Osoba("Grześ", "Wojtiuk", "Miedzyrzec", "ms-appx:///Assets//grzes.png"));
            ListBox.ItemsSource = osoba;
        }
        private void Dodaj_Click(object sender, RoutedEventArgs e)
        {
            osoba.Add(new Osoba(ImieTxt.Text, NazwiskoTxt.Text, AdresTxt.Text, "ms-appx:///Assets//Marian.png"));
        }

        private void Usun_Click(object sender, RoutedEventArgs e)
        {

            Osoba kill = (Osoba)ListBox.SelectedItem;
            osoba.Remove(kill);
        }

        private void Edytuj_Click(object sender, RoutedEventArgs e)
        {
            Osoba o = (Osoba)ListBox.SelectedItem;

            o.Imie = ImieTxt.Text;
            o.Nazwisko = NazwiskoTxt.Text;
            o.Adres = AdresTxt.Text;
        }
        private void Szczegoly_Click(object sender, RoutedEventArgs e)
        {
            ShowNewWindow(sender, e);
        }
        AppWindow appWindow;
        Frame appWindowFrame = new Frame();
        private async void ShowNewWindow(object sender, RoutedEventArgs e)
        {
            Osoba osos = (Osoba)ListBox.SelectedItem;

            appWindow = await AppWindow.TryCreateAsync();
            appWindowFrame.Navigate(typeof(Form2),osos);
            ElementCompositionPreview.SetAppWindowContent(appWindow, appWindowFrame);
            appWindow.Closed += delegate
            {
                appWindowFrame.Content = null;
                appWindow = null;
            };
            await appWindow.TryShowAsync();
        }
    }
}