private static IConfigurationBuilder AddEnvironmentAppSettings(this IConfigurationBuilder configurationBuilder)
        {
            var currentEnvironment             = AppEnvironment.GetCurrent();
            var environmentAppSettingsFileName = $"{AppSettingsFileName}.{currentEnvironment}.json";
            var environmentAppSettings         = AppSettings.GetAll().SingleOrDefault(s => s.FileName.EndsWith(environmentAppSettingsFileName, StringComparison.OrdinalIgnoreCase));

            if (environmentAppSettings != null)
            {
                configurationBuilder.AddJsonStream(environmentAppSettings.GetContent());
            }

            return(configurationBuilder);
        }