appsettings.Production.json is not used when using IIS

[rlarno]

The .Net agent only uses the appsettings.{environment}.json if either the ASPNETCORE_ENVIRONMENT or the NewRelic custom EnvironmentName environment variable is set. This is in contrast to the default .NET environment behaviour where if nothing is set in the environment variables, the IHostEnvironment.EnvironmentName is by default set to Production

Production: The default if DOTNET_ENVIRONMENT and ASPNETCORE_ENVIRONMENT have not been set.

As such, the below code should act the same and thus should add another

            if (string.IsNullOrEmpty(environment))
            {
                environment = Environments.Production; // Microsoft.Extensions.Hosting
            }

https://github.com/newrelic/newrelic-dotnet-agent/blob/f8dcf184dd98c18601b34c7fc186f7d83d1b90fb/src/Agent/NewRelic/Agent/Core/Configuration/AppSettingsConfigResolveWhenUsed.cs#L52C1-L52C1

[workato-integration]

https://new-relic.atlassian.net/browse/NR-181142

[tippmar-nr]

@rlarno Thanks for your report. We are reviewing the information you've provided and will get this issue on our backlog soon.