Oct 02, 2018 12:44 PM|PatriceSc|LINK
What happens if you change the language version and then go back to 3.5 ? If I remember you often have most language features working on the old CLR but a couple that requires the new runtime. My guess is that MS don't want to explicitely allow this even
thought it should work for most features...
It seems to even sort of work with C#7 according to https://stackoverflow.com/questions/42672957/c-sharp-7-net-clr-visual-studio-version-requirements/42675053#42675053 but
it seems you need aditional packages etc...
My personal preference in the same situation would be to invest my time into upgrading the .NET version...