This might have been answered before but couldn't get confirmation on this. We upgraded from 4.6.11 to 4.7 and to 5.1. We are planning to upgrade to 5.2 over next few days. We still have legacy workflow which was built on 4.6.11. Current version of Visual studio is 2013 Professional with latest service pack. We would like to upgrade version of Visual Studio to 2017 but from this link:

https://help.k2.com/news/k2fivetechnologies

It supports only till VS 2015. There is no mention of VS 2017. 

Can anyone confirm here if it is ok to upgrade Visual Studio to 2017?