Why is Dzsave not working?

[HllbllyD]

Hi, I'm trying to create deepzoom images in my C# wpf project, using netvips,
but for some reason it doesn't work and I can't figure out the error.

Here's my code:

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.Windows.Forms;
using NetVips;
using Microsoft.Win32;
using System.IO;
using Path = System.IO.Path;
using static NetVips.Enums;
using static System.Windows.Forms.VisualStyles.VisualStyleElement.TrayNotify;
using System.ComponentModel;

namespace WpfNetVipsDeepZoomMultipleImages
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
        private void CreateDeepZoomButton_Click_1(object sender, RoutedEventArgs e)
        {
            try
            {
                //using (var openFileDialog = new System.Windows.Forms.OpenFileDialog())
                Microsoft.Win32.OpenFileDialog openFileDialog = new Microsoft.Win32.OpenFileDialog
                {
                    Multiselect = true,
                    Title = "Select image files for Deep Zoom",
                    Filter = "Image Files|*.jpg;*.jpeg;*.png|All Files|*.*"
                };
                    if (openFileDialog.ShowDialog() == true)
                    {
                        // Get the selected output folder
                        var saveFolderDialog = new System.Windows.Forms.FolderBrowserDialog
                        {
                            Description = "Select a folder to save Deep Zoom images",
                            ShowNewFolderButton = true
                        };
                        if (saveFolderDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                        {
                            string outputFolder = saveFolderDialog.SelectedPath;

                            // Set the Deep Zoom tile size (e.g., 256 for a common size)
                           int tileSize = 256;

                            // Set the Deep Zoom overlap size (e.g., 1 for no overlap)
                            int overlap = 1;

                            // Set the Deep Zoom format (jpeg or png)
                            string format = "jpeg";

                            //ProcessImages(openFileDialog.FileNames, outputFolder, tileSize, overlap, format);

                            System.Windows.MessageBox.Show("Deep Zoom images created successfully!", "Success", MessageBoxButton.OK, MessageBoxImage.Information);
                        }
                    }
            }
            catch (Exception ex)
            {
                System.Windows.MessageBox.Show($"Error: {ex.Message}", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
            }
        }

        private void ProcessImages(string[] imagePaths, string outputFolder, int tileSize, int overlap, string format)
        {
            foreach (var imagePath in imagePaths)
            {
                try
                {
                    // Load the image using NetVips
                    var image = NetVips.Image.NewFromFile(imagePath);

                    // Create output folder if it doesn't exist
                    Directory.CreateDirectory(outputFolder);

                    // Build the output file path
                    var outputFileName = Path.GetFileNameWithoutExtension(imagePath) + "_dz";
                    var outputFilePath = Path.Combine(outputFolder, outputFileName,  tileSize, overlap, format);

                    // Save the image as Deep Zoom
                    //Dzsave(string filename, [string imagename = null], [NetVips.Enums.ForeignDzLayout ? layout = null], [string suffix = null], [int ? overlap = null], [int ? tileSize = null], [bool ? centre = null], [NetVips.Enums.ForeignDzDepth ? depth = null], [NetVips.Enums.Angle ? angle = null], [NetVips.Enums.ForeignDzContainer ? container = null], [int ? compression = null], [NetVips.Enums.RegionShrink ? regionShrink = null], [int ? skipBlanks = null], [string id = null], [int ? q = null], [NetVips.Enums.ForeignKeep ? keep = null], [double[] background = null], [int ? pageHeight = null], [string profile = null])

                    image.Dzsave(imagePath, outputFilePath);

                    // Dispose of the image
                    //image.Dispose();

                    // Deep Zoom image created successfully for the current image
                    Console.WriteLine($"Deep Zoom image created for: {imagePath}");
                }
                catch (Exception ex)
                {
                    System.Windows.MessageBox.Show($"Error for {imagePath}: {ex.Message}", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
                }
            }
        }     
    }
}