"ConnectionStrings": {
    "ConnDefault": "123",
    "ConnList":[ "345", "2343", "0000" ]
  },

  public class ConnectionStringsModel
    {
        public string ConnDefault { get; set; }
        public List<string> ConnList { get; set; }
    }

 private readonly ILogger<HomeController> _logger;
        private readonly IConfiguration _Configuration;

        public HomeController(ILogger<HomeController> logger,
            IConfiguration configuration

            )
        {
            _logger = logger;
            _Configuration = configuration;
        }

 public IActionResult ReadConfig()
        {
            base.ViewBag.Version = _Configuration["Version"];
            base.ViewBag.AllowedHosts = _Configuration["AllowedHosts"];
            base.ViewBag.LoggingDefault = _Configuration["Logging:LogLevel:Default"];


            var oValue = _Configuration.GetSection("ConnectionStrings").Get<Models.ConnectionStringsModel>();

            base.ViewBag.ConnectionStrings = Newtonsoft.Json.JsonConvert.SerializeObject(oValue);


            return View();
        }