상속: System.Windows.Controls.ContentControl
        public static void Show()
        {
            var scanner = new CodeScannerPopup();
            var popup = new Popup { Child = scanner };
            popup.IsOpen = true;

            scanner.CloseRequested += ( _, __ ) => popup.IsOpen = false;
        }
        public static void Show()
        {
            var scanner = new CodeScannerPopup();
            var popup   = new Popup {
                Child = scanner
            };

            popup.IsOpen = true;

            scanner.CloseRequested += (_, __) => popup.IsOpen = false;
        }