How do I use System.Text.Json in a .NetStandardLibrary 2.1?

[aligneddev]

File new project > .NetStandardLibrary 2.1 (for a .Net Core 3.0 project).

 public class Class1
    {
        public void test()
        {
            JsonSerializer
        }
    }

I can't add the System.Text.Json NuGet package and adding the using doesn't work.

Can I use System.Text.Json in .NetStandardLibrary2.1?

[huoyaoyuan]

I can't add the System.Text.Json NuGet package and adding the using doesn't work.

How can't you add the NuGet package? It's available for every framework that supersets netstandard2.0.

[aligneddev]

I tried it and the NuGet manager failed. I just tried it again in a brand new 2.1 project and Nuget worked fine.

I guess I just had something wrong in VS or that project. I'll close this out and it can be ignore.
Thank you.