Flipview not working

Question

 private async void flipview1_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            FileOpenPicker openPicker = new FileOpenPicker();
            openPicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
            openPicker.ViewMode = PickerViewMode.Thumbnail;

            // Filter to include a sample subset of file types.
            openPicker.FileTypeFilter.Clear();
            openPicker.FileTypeFilter.Add(".bmp");
            openPicker.FileTypeFilter.Add(".png");
            openPicker.FileTypeFilter.Add(".jpeg");
            openPicker.FileTypeFilter.Add(".jpg");

            IReadOnlyList<StorageFile> files = await openPicker.PickMultipleFilesAsync();

            foreach (StorageFile Images in files)
            {

                // file is null if user cancels the file picker.
                if (Images != null)
                {
                    // Open a stream for the selected file.
                    IRandomAccessStream fileStream = await Images.OpenAsync(FileAccessMode.Read);

                    // Set the image source to the selected bitmap.
                    BitmapImage bitmapImage = new BitmapImage();

                    bitmapImage.SetSource(fileStream);
                    image.Source = bitmapImage;
                    this.DataContext = Images;
                }
                //flipview1.Items.Add(Images);  // this code woking but only one image is showing 
                flipview1.ItemsSource = Images; // An exception of type 'System.ArgumentException' occurred in test.exe but was not handled in user code
                
                
            }
          
        }

<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <FlipView x:Name="flipview1" HorizontalAlignment="Left" VerticalAlignment="Top"  Width="1071" Height="513" Margin="123,177,0,0" SelectionChanged="flipview1_SelectionChanged">
            <Image x:Name="image" />
        </FlipView>

flipview not working