The offline books will need to be added during an installation of Visual Studio 2017, under Individual Components | Code tools | Help Viewer (the blog explains the full process). 'We will be continuously updating the content, so you will no longer be stuck with outdated books and wait 6 months for the next release.' 'We are also hosting the book generation and fetching services entirely on Microsoft Azure, which makes them more performant and reliable,' according to Den Delimarsky, the program manager responsible for the site, in a blog post.

And much of those help resources will be available in a downloadable format, so that a live Internet connection isn't the one thing to keep developers from keeping those resources within arm's reach. It's a good thing that Microsoft is using Azure to maintain accuracy and reliability of the information, as the information will be stored and updated nearly as immediately as it's created, rather than taking the usual six months or so to update it. With the newness of Visual Studio 2017, the help system will probably be getting tested to its limits.

Visual studio 2019 offline