WPF ListBox acts image container, ItemTemplate,DataTemplate,

<Window x:Class="WpfApp100.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp100" WindowState="Maximized"
        mc:Ignorable="d"  
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <ListBox x:Name="lbx" 
                 ItemsSource="{Binding ImgsCollection,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" 
                 BorderBrush="Blue" BorderThickness="3" >
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel>
                        <Image Source="{Binding Content,RelativeSource={RelativeSource AncestorType=ListBoxItem}}" Stretch="Uniform"/>
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
    </Grid>
</Window>




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.Navigation;
using System.Windows.Shapes;
using System.IO;
using System.ComponentModel;

namespace WpfApp100
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window, INotifyPropertyChanged
    {
        public MainWindow()
        {
            Color color = (Color)ColorConverter.ConvertFromString("#FFA500");
            InitializeComponent();
            this.DataContext = this;
            FillImgList();
            
        }

        public event PropertyChangedEventHandler PropertyChanged;
        private void OnPropertyChanged(string propName)
        {
            var handler = PropertyChanged;
            if (handler != null)
            {
                handler?.Invoke(this, new PropertyChangedEventArgs(propName));
            }
        }

        List<string> imgsCollection;
        public List<string> ImgsCollection
        {
            get
            {
                return imgsCollection;
            }
            set
            {
                if (value != imgsCollection)
                {
                    imgsCollection = value;
                    OnPropertyChanged(nameof(ImgsCollection));
                }
            }
        }

        private double zoomLevel = 1;
        public double ZoomLevel
        {
            get
            {
                return zoomLevel;
            }
            set
            {
                if (value != zoomLevel)
                {
                    zoomLevel = value;
                    OnPropertyChanged(nameof(ZoomLevel));
                }
            }
        }

        void FillImgList()
        {
            string str = @"..\..\Images";
            string fullDir = System.IO.Path.GetFullPath(str);
            if (Directory.Exists(fullDir))
            {
                var imgs = Directory.GetFiles(fullDir, "*", SearchOption.AllDirectories);
                ImgsCollection = new List<string>(imgs);
            }
        }  
    }
}