oap_labs/Windows/DetailWindow.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using wpf_listbox.models;

namespace wpf_listbox.Windows
{
    public partial class DetailWindow : Window
    {

        public People currentPeople { get; set; }

        // конструктор класса окна
        public DetailWindow(People currentPeople)

        {
            // и инициализируем в конструкторе
            this.currentPeople = currentPeople;

            InitializeComponent();
            DataContext = this.currentPeople;
        }
        private void ExitButton_Click(object sender, RoutedEventArgs e)
        {
            this.DialogResult = true;

        }
    }
}