//...
            services
                .AddApiVersioning(options =>
                {
                    options.AssumeDefaultVersionWhenUnspecified = true;
                    options.ReportApiVersions = true;

                    // Default version
                    var defaultVersion = Configuration.GetValue("RESTworld:Versioning:DefaultVersion", "*");
                    if (defaultVersion == "*")
                    {
                        options.ApiVersionSelector = new LatestApiVersionSelector();
                    }
                    else
                    {
                        if (!ApiVersionParser.Default.TryParse(defaultVersion, out var parsedVersion) || parsedVersion is null)
                            throw new ArgumentOutOfRangeException("RESTworld:Versioning:DefaultVersion", defaultVersion, "The setting for \"RESTworld:Versioning:DefaultVersion\" was neither \"*\" nor a valid API version.");

                        options.DefaultApiVersion = parsedVersion;
                    }

                    // Version parameter
                    var allowQueryStringVersioning = Configuration.GetValue("RESTworld:Versioning:AllowQueryParameterVersioning", false);
                    if (allowQueryStringVersioning)
                    {
                        options.ApiVersionReader = ApiVersionReader.Combine(
                            new MediaTypeApiVersionReader(versionParameterName),
                            new QueryStringApiVersionReader(versionParameterName));
                    }
                    else
                    {
                        options.ApiVersionReader = new MediaTypeApiVersionReader(versionParameterName);
                    }
                })
                .AddApiExplorer(options =>
                {
                    options.GroupNameFormat = "'v'VVV";

                    // Do not advertise versioning through query parameter as this is only intended for legacy clients and should not be visible as it is not considered RESTfull.
                    if (options.ApiVersionParameterSource is not MediaTypeApiVersionReader)
                    {
                        options.ApiVersionParameterSource = new MediaTypeApiVersionReader(versionParameterName);
                    }
                })
                .AddMvc();
//...

    public class LatestApiVersionSelector : IApiVersionSelector
    {
        /// <inheritdoc/>
        public ApiVersion SelectVersion(HttpRequest request, ApiVersionModel model)
            => model.ImplementedApiVersions.OrderByDescending(v => v).FirstOrDefault() ?? ApiVersion.Default ?? ApiVersion.Neutral;
    }

[ApiController]
[Produces("application/hal+json")]
[Route("")]
[ApiVersionNeutral]
public class HomeController : ControllerBase
{
    [HttpGet]
    [ProducesResponseType(typeof(Resource), StatusCodes.Status200OK)]
    public virtual IActionResult Index(ApiVersion version)
    {
        // ...
    }
}