Steve Dower added the comment:
This is a bug in Visual Studio, not Python.
There is an RC release of the Python support with a fix for this bug is
available at https://github.com/Microsoft/PTVS on the releases page, and an
actual update will appear in notifications within a couple of weeks. VS
New submission from Edward Laier:
I installed Python 3.6 on my Microsoft server 2016 , running VS 2015 Community.
I tried the path to Python Environment, then auto-detect, VS crashes and then
when it restarts it will have the "+ Custom" grayed out. Where I then have to
remove the key to ungray
