将对象从子窗口传回 MainWindow

问：

我正在尝试创建一个小数据库程序，您可以在其中添加、修改和删除新闻网站的文章。有一个带有 DataGrid 的 MainWindow 来显示所有文章。按下“添加”按钮后，将打开一个新窗口，供您编辑新创建的文章。或者可以按下修改按钮来编辑当前选择的文章。如何将文章传递回 MainWindow 以将其添加到 ObservableCollection/modify ObservableCollection？

public partial class MainWindow : Window
    {
        private int lastIdArtikel = 0;
        private Artikel currentSelection = null; 
        private ObservableCollection<Artikel> ArtikelDatabase = new ObservableCollection<Artikel>();

        private void Add_Click(object sender, RoutedEventArgs e)
        {
            Artikel nieuwArtikel = new Artikel(++lastIdArtikels);
            ArtikelDatabase.Add(nieuwArtikel);
            ArtikelVenster artikelVenster = new ArtikelVenster(ref nieuwArtikel);
            artikelVenster.Show();
        }

        private void Modify_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                ArtikelVenster artikelVenster = new ArtikelVenster(ref huidigeSelectie);
                artikelVenster.Show();
            }
            catch (NullReferenceException exception)
            {
                Console.WriteLine(exception.StackTrace);
            }            
        }

 public partial class ArtikelVenster : Window
    {
        public Artikel artikel { get; private set; }
        public int id { get; private set; }
        public string title { get; private set; }
        public object category { get; private set; }
        public string nameJournalist { get; private set; }
        public bool mayBePublished { get; private set; }
        public bool isPublished { get; private set; }
        public string content { get; private set; }
        public int length { get; private set; }

        public ArtikelVenster(ref Artikel huidigArtikel)
        {
            InitializeComponent();
            artikel = huidigArtikel;
            try
            {
                LaadData();
            }
            catch (NullReferenceException exception)
            {
                Console.WriteLine(exception.StackTrace);
            }
            CategorieBox.SelectedIndex = 2;
        }

        private void Cancel_Click(object sender, RoutedEventArgs e)
        {
            this.Close();
        }

        private void LaadData()
        {
            IdLabel.Content = artikel.id;
            DatumLabel.Content = artikel.creationDate.ToString();
            TitelBox.Text = artikel.title;
            CategorieBox.SelectedItem = artikel.category;
            NaamJournalistBox.Text = artikel.nameJournalist;
            IsGepubliceerdToggle.IsChecked = artikel.isPublished;
            MagGepubliceerdWordenToggle.IsChecked = artikel.mayBePublished;
            if (artikel.content == null)
            {
                InhoudBox.Selection.Text = "";
            }
            else
            {
                InhoudBox.Selection.Text = artikel.content;
            }
        }

        private void Confirm_Click(object sender, RoutedEventArgs e)
        {
            if (artikel == null)
            {
                Artikel nieuwArtikel = new Artikel(id);
                nieuwArtikel.updateArtikel(title, category, nameJournalist, mayBePublished, isPublished, content, length);
                artikel = nieuwArtikel;
            }
            else
            {
                artikel.updateArtikel(title, category, nameJournalist, mayBePublished, isPublished, content, length);
            }
            this.Close();
        }

        private void TitelBox_TextChanged(object sender, TextChangedEventArgs e)
        {
            title = TitelBox.Text;
        }

        private void CategorieBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            category = CategorieBox.SelectedItem;
        }

        private void NaamJournalistBox_TextChanged(object sender, TextChangedEventArgs e)
        {
            nameJournalist = NaamJournalistBox.Text;
        }
    }

    public class Artikel
    {
        public int id { get; private set; }
        public string title { get; private set; }
        public object category { get; private set; }
        public string nameJournalist { get; private set; }
        public bool mayBePublished { get; private set; }
        public bool isPublished { get; private set; }
        public string content { get; private set; }
        public int length { get; private set; }
        public DateTime creationDate { get; private set; }

        public Artikel(int id)
        {
            this.id = id;
            this.creationDate = DateTime.Now;
        }

        public void updateArtikel(string title, object category, string nameJournalist, bool mayBePublished, bool isPublished, string content, int length)
        {
            this.title = title;
            this.category = category;
            this.nameJournalist = nameJournalist;
            this.mayBePublished = mayBePublished;
            this.isPublished = isPublished;
            this.content = content;
            this.length = length;
        }
    }
}

为了使其更具可读性，省略了某些部分。如果需要更多信息，请告诉我。