Use IWebHostEnvironment in Program.cs web host builder in ASP.NET Core 3.1

[n1ghtmare]

In the Program.cs, when setting up the web host builder, is it possible to determine if we're in development environment, instead of doing:

public class Program {
    public static void Main(string[] args) {
        CreateHostBuilder(args).Build().Run();
    }

    private static bool IsDevelopment =>
        Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") == "Development";
        
    public static string HostPort =>
        IsDevelopment
            ? "5000"
            : Environment.GetEnvironmentVariable("PORT");

    public static IHostBuilder CreateHostBuilder(string[] args) =>
        Host.CreateDefaultBuilder(args)
            .ConfigureWebHostDefaults((webBuilder) => {
                webBuilder.UseUrls($"http://+:{HostPort}");
                webBuilder.UseSerilog((context, config) => {
                    config.ReadFrom.Configuration(context.Configuration);
                });
                webBuilder.UseStartup<Startup>();
            });
}

Have something like:

public class Program {
    public static void Main(string[] args) {
        CreateHostBuilder(args).Build().Run();
    }

    public static IHostBuilder CreateHostBuilder(string[] args) =>
        Host.CreateDefaultBuilder(args)
            .ConfigureWebHostDefaults((webBuilder) => {
                // ???????
                webBuilder.UseUrls(
                    env.IsDevelopment() 
                        ? "http://+:5000" 
                        : $"http://+:{Environment.GetEnvironmentVariable("PORT")}"
                    );
                webBuilder.UseSerilog((context, config) => {
                    config.ReadFrom.Configuration(context.Configuration);
                });
                webBuilder.UseStartup<Startup>();
            });
}

Is there a way to do this?

[troyji]

Does this fit your needs better?

webBuilder.GetSetting("Environment") == "Development"

[n1ghtmare]

I mean, I suppose that's a bit better sure. Thanks.