.NET Core console application, how to configure appSettings per environment?

Question

I have a .NET Core 1.0.0 console application and two environments. I need to be able to use appSettings.dev.json and appSettings.test.json based on

Answer 1

For those who are using .NET Core version 2.1.0+ and Microsoft.Extensions.Hosting to host your console app, you can use the following code (according to the Feiyu Zhou's answer in another thread):

var hostBuilder = new HostBuilder()
    .ConfigureHostConfiguration(config =>
    {
        if (args != null)
        {
            // enviroment from command line
            // e.g.: dotnet run --environment "Staging"
            config.AddCommandLine(args);
        }
    })
    .ConfigureAppConfiguration((context, builder) =>
    {
        builder.SetBasePath(AppContext.BaseDirectory)
            .AddJsonFile("appsettings.json", optional: false)
            .AddJsonFile($"appsettings.{context.HostingEnvironment.EnvironmentName}.json", optional: true);
    })