ASP.NET Core access Configuration from static class

  public static string GetSetting(string keyName)
        {
            var archivo = "appsettings.json";
            var ambiente = System.Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT");
            if (!string.IsNullOrEmpty(ambiente))
                archivo = $"appsettings.{ambiente}.json";

            var builder = new ConfigurationBuilder()
            .SetBasePath(Directory.GetCurrentDirectory())
           .AddJsonFile(archivo);

            Configuration = builder.Build();

            return Configuration[keyName].ToString().Trim();
        }




public class Program
{
    public static IConfigurationRoot Configuration { get; set; }
    public static void Main(string[] args = null)
    {
        var builder = new ConfigurationBuilder()
             .SetBasePath(Directory.GetCurrentDirectory())
            .AddJsonFile("appsettings.json");

        Configuration = builder.Build();

        Console.WriteLine($"option1 = {Configuration["option1"]}");
    }
}