|[Marking as NEWS - this is not a question but this is an appropriate forum IMO]
If you develop in C++/CLI with Visual Studio 2017, beware that update 15.9.6 introduced a very bad codegen bug. C++/CLI apps will crash if you use /std:c++17 or /std:c++latest. The workaround is to drop back to C++14 language support.
Here's the issue if you care to vote.
Again, this is FYI as it has cost me multiple days of work diagnosing why our application suddenly stopped working.