fair enough. then u should take this into consideration
github.com/SimonCropp/P...

so why not net472 or similar?

out of curiosity, why do u need netstandard2?

Looks like a compiler bug to me

here is a clean project with no polyfill and targeting netstandard2.

AFAIK there is no way for polyfill to fix that

happy to help

(speculating) string.IsNullOrWhitespace is an exiting method. some TFMs have it null attributed. some dont. and Polyfill cant change the behavior of an existing method

what TFM is the error showing in.

got a branch i can take a look at?

is it an arm device?

that episode gave me nightmares as a child. it was excellent

nice to hear. is it oss? i could do a review of your setup

that doesnt help in this situation.