How to correctly instrument library distributed as NuGet package?

[valxv]

If ActivitySource created in my library has a different name than in the calling application, it is ignored and does not provide any output.
In the Microservice example, you use Propagators API to propagate calling activity context from Producer to Consumer. But for some reason, it does not work in my case. For example:

var serviceName = "App";
var serviceVersion = "0.0.1";

using var tracerProvider = Sdk.CreateTracerProviderBuilder()
       .AddSource(serviceName)
       .SetResourceBuilder(
           ResourceBuilder.CreateDefault()
               .AddService(serviceName: serviceName, serviceVersion: serviceVersion))
       .AddConsoleExporter()
       .Build();

using var appSource = new ActivitySource(serviceName, serviceVersion);
using var appActivity = appSource.StartActivity("App activity", ActivityKind.Producer);
if (appActivity?.IsAllDataRequested == true)
{
       using var librarySource = new ActivitySource("Some Library name", serviceVersion);
       using var childActivity = librarySource.StartActivity("Library activity", ActivityKind.Consumer, appActivity.Context);
       childActivity?.AddEvent(new ActivityEvent("Test event"));
}

The childActivity becomes logged only if I initialize the librarySource with the same serviceName. If they have the same name I don't even need to pass parent activity context to the librarySource.StartActivity method.

Should I somehow pass to the library the calling application ActivitySource (ActivitySource name)?
Is there a better way?

[cijothomas]

The app owner has to do AddSource("Some Library name").
AddSource() supports wild card, so a "*" will listen to all sources in the process.

[valxv]

Thanks!