protected override void OnDetaching()
        {
            AssociatedObject.AutoGeneratingColumn -= OnAutoGeneratingColumn;

            CultureFormat = null;

            base.OnDetaching();
        }
        protected override void OnAttached()
        {
            base.OnAttached();

            CultureFormat = UserDefinedCultureFormat.Default;

            AssociatedObject.AutoGeneratingColumn += OnAutoGeneratingColumn;
        }