Visual studio 2017 go to implementation not work for .net standard library
I am having the same issue after upgrading to .Net core 2.1. As work around I use
F12 then Ctrl+F12 from the Interface
Update: Seems like it is VS issue and there is no plan to be resolved soon
https://developercommunity.visualstudio.com/content/problem/111096/f12-go-to-definition-does-not-work-in-net-standard.html