public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            DataContext = new ViewModel();
        }
    }
    public class ViewModel : INotifyPropertyChanged
    {
        private User selecedItme;
        public User SelecedItme
        {
            get { return selecedItme; }
            set
            {
                if (selecedItme != value)
                {
                    selecedItme = value;
                    OnPropertyChanged("SelecedItme");
                }
            }
        }
        private ObservableCollection<User> users = new ObservableCollection<User>();
        public ObservableCollection<User> Users
        {
            get { return users; }
            set
            {
                if (users != value)
                {
                    users = value;
                    OnPropertyChanged("Users");
                }
            }
        }
        public ViewModel()
        {
            Users.Add(new User() { Id = 1 ,Name = "user1" }) ;
            Users.Add(new User() { Id = 2, Name = "user2" });
            Users.Add(new User() { Id = 3, Name = "user3" });
            Users.Add(new User() { Id = 5, Name = "user4" });
            Users.Add(new User() { Id = 6, Name = "user5" });
        }
        public event PropertyChangedEventHandler PropertyChanged;
        protected void OnPropertyChanged([CallerMemberName] string name = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
        }
    }
    
    public class User 
    {
        public int Id { get; set; }
        public string Name { get; set; }
    }