Fluent.ComboBox.OnDropDownClosed C# (CSharp) Method

        protected override void OnDropDownClosed(EventArgs e)
        {
            base.OnDropDownClosed(e);
            if (Mouse.Captured == this) Mouse.Capture(null);
            if (focusedElement != null) focusedElement.LostKeyboardFocus -= OnFocusedElementLostKeyboardFocus;
            focusedElement = null;
            ShowPopupOnTop = false;
            galleryPanel.Width = double.NaN;
            scrollViewer.Height = double.NaN;
        }