Change name that is default in IIS after PORT:80

• Click on your site/application.

• on the right panel click on basic settings.

• here you can change the name.

You can create a virtual directory of that name.. Right-Click on your Project and select Properties, and then you web and then checked Override application root URL and then Change.

in file program.cs

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

        public static IWebHost BuildWebHost(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseStartup<Startup>()
                .UseUrls("http://localhost:4000")
                .Build();
    }

use for dotnet core