How to change the default port in asp.net Core 3

I finally got it
before

   webBuilder.UseStartup<Startup>();

add

 webBuilder.UseUrls("https://*:8081", "http://*:8080");

this is the code

public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureServices((hostContext, services) =>
                {
                    services.AddHostedService<Worker>();
                }).UseWindowsService()
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseUrls("https://*:8081", "http://*:8080");
                    webBuilder.UseStartup<Startup>();
                })
            .UseSerilog();
}

I hope it can be useful to someone else. thank you

Yoy can simple changing the port via changing the LaunchSettings.json.

you can find by Properties-> LaunchSettings.json.

{
  "iisSettings": {
  "iisExpress": {
  "applicationUrl": "http://localhost:8080",
  "sslPort": 96085<== Change_This as you wish
  }
},

Use command line arguments

dotnet run --urls "http://localhost:5100;https://localhost:5101"

• OR -

dotnet /Product/Full/Path/Product.dll --urls "http://localhost:5100;https://localhost:5101"