WPF ItemsPanelTemplate per Click WrapPanel.Orientation chang

If you want to switch the orientation of the WrapPanel between vertical and horizontal with the click of a button, you could try the following code. If I misunderstood, please let me know.

MainWindow.xaml:

  <Grid>  
        <Grid.RowDefinitions>  
            <RowDefinition/>  
            <RowDefinition/>  
        </Grid.RowDefinitions>  
        <DockPanel>  
            <ListBox x:Name="LB" Height="160" Width="90" DockPanel.Dock="Left" SelectionChanged="LB_SelectionChanged"   >  
            <ListBox.ItemsPanel>  
                <ItemsPanelTemplate>  
                    <WrapPanel Background="AliceBlue"  Orientation="Vertical" x:Name="WP" />  
                </ItemsPanelTemplate>  
            </ListBox.ItemsPanel>  
            <ListBox.ItemTemplate>  
                <DataTemplate>  
                    <Image Height="50" Width="50" Source="{Binding Path=UriSource}" Stretch="Fill" />  
                </DataTemplate>  
            </ListBox.ItemTemplate>  
        </ListBox>  
        </DockPanel>  
        <Button x:Name="BTN_Rotation" Content="Dreh" Click="BTN_Rotation_Click"  Grid.Row="1" />  
    </Grid>  

MainWindow.xaml.cs:

using System;  
using System.Collections.ObjectModel;  
using System.ComponentModel;  
using System.Runtime.CompilerServices;  
using System.Windows;  
using System.Windows.Controls;  
using System.Windows.Media;  

namespace ListBoxOrientationChangedPerClick  
{  
  public partial class MainWindow : Window  
  {  
    public MainWindow()  
    {  
      InitializeComponent();  
      list.Add(new MyImage() { UriSource=@"6.jpg" });  
      list.Add(new MyImage() { UriSource=@"6.jpg" });  

      LB.ItemsSource = list;  
    }  
    ObservableCollection<MyImage> list=new ObservableCollection<MyImage>();  
    private T FindVisualChild<T>(DependencyObject obj) where T : DependencyObject  
    {  
      for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)  
      {  
        var child = VisualTreeHelper.GetChild(obj, i);  
        if (child != null && child is T)  
          return (T)child;  
        var childOfChild = FindVisualChild<T>(child);  
        if (childOfChild != null)  
          return childOfChild;  
      }  
      return null;  
    }  
    private void BTN_Rotation_Click(object sender, RoutedEventArgs e)  
    {  
      WrapPanel wrapPanel = FindVisualChild<WrapPanel>(LB);  
      if(wrapPanel.Orientation== Orientation.Horizontal)  
      {  
        wrapPanel.Orientation=Orientation.Vertical;  
      }  
      else  
      {  
        wrapPanel.Orientation = Orientation.Horizontal;  
      }  
    }  
    private void LB_SelectionChanged(object sender, SelectionChangedEventArgs e)  
    {  
    }  
  }  
  public class MyImage : INotifyPropertyChanged  
  {  
    private string _img;  
    public string UriSource  
    {  
      get { return _img; }  
      set  
      {  
        _img = value;  
        NotifyPropertyChanged();  
      }  
    }  
    public event PropertyChangedEventHandler PropertyChanged;  
    private void NotifyPropertyChanged([CallerMemberName] String propertyName = "")  
    {  
      if (PropertyChanged != null)  
        PropertyChanged(this, new PropertyChangedEventArgs(propertyName));  
    }  
  }  
}  

The result:

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