[Question] Where is close message box button?

[h4p4]

There is no close button neither in CustomMaterialMessageBox.cs not in MaterialMessageBox.cs
Had to hard code it in my case :(
like this:

var closeBtn = new Button()
        {
            Content = "X",
            HorizontalAlignment = HorizontalAlignment.Right,
            Background = (SolidColorBrush)_brushes["BackgroundBaseBrush"],
            BorderBrush = (SolidColorBrush)_brushes["BorderBaseBrush"]
        };

        Grid.SetColumn(closeBtn, 2);
        messageBox.TitleBackgroundPanel.Children.Add(closeBtn);

        closeBtn.Click += (_, _) =>
        {
            messageBox.Close();
        };