What is the reccomendation of using System.Text.Json and double NaN values ?

[valeriob]

Hi,
we are upgrading some applications to aspnetcore 3.0, we have been bitten by something unexpected : System.Text.Json refuse to serialize double.NaN values.
This cause really nasty bugs because something that works suddenly does not because some result of some calculation is different, or some data changes in some way.
I see that the recommendation (https://docs.microsoft.com/en-us/aspnet/core/migration/22-to-30?view=aspnetcore-3.0&tabs=visual-studio#jsonnet-support) is to use Json.Net.

But how can ppl use this library if such a simple and common use case is not covered ?
I do not know any application that can live without this feature, i understand the fact that there is a specification, but it may very well be unpractical.
https://thefactotum.xyz/post/the-devil-is-in-the-json-details/
Python, Go, Javascript,Rust, Ruby handle it without making much fuss 😄

Thanks
Valerio

[pranavkm]

This issue was moved to dotnet/corefx#41442