NoDoxx is an extension that help you protect your configuration values while displaying code to others.
By default it will hide your configuration values behind an overlay, with a button to display them again in both the menus(tools->"NoDoxx: Toggle config value visibility", or via a toolbar button that you can add via View->Toolbars).
Extension is open to unsolicited pull requests.
And be a dear and report bugs please. Santa clause will love you for it.
You can always find the latest version on the Visual Studio Marketplace, or by searching for the extension NoDoxx or Don't Doxx Yourself in Visual Studio.