Geolocation logic

IPLocation.cs

namespace App.Models {
  public class IPLocation {
    public string ZipPostalCode { get; set; }
    public double Latitude { get; set; }
    public double Longitude { get; set; }
    public string City { get; set; }
    public string RegionName { get; set; }
  }
}

LocationControllerBase.cs

namespace App.Controllers {
  public class LocationControllerBase : Controller {
    private const string zipCodeCache = "zipCodeCache";
    private const string ipLocationCache = "ipLocationCache";

    public string ZipCode {
      get {
        if (Session[zipCodeCache] == null) {
          if (Request.IsAuthenticated) {
            using (var container = new WindsorContainer()) {
              IGenericRepository<UserProfile> _userProfileRepository = new GenericRepository<UserProfile>(ConfigurationManager.ConnectionStrings["BaseJunkieConnectionString"].ConnectionString);
              Session[zipCodeCache] = _userProfileRepository.Get.Single(up => up.UserId == UserId()).PostalCode;
            }
          } else {
            Session[zipCodeCache] = Location.ZipPostalCode.Trim();
          }
        }
        return Session[zipCodeCache].ToString();
      }
    }

    public virtual IPLocation Location {
      get {
        if (Session[ipLocationCache] == null) {
          string ipURL = ConfigurationManager.AppSettings["IPLocationAPI"];
          string ipAddress = Request.ServerVariables["REMOTE_ADDR"];
          if (new string[] { "127.0.0.1", @"::1" }.Contains(ipAddress)) {
            ipAddress = "71.12.191.59"; // Default for testing on localhost
          }
          XDocument xDoc = XDocument.Load(string.Concat(ipURL, ipAddress));
          IPLocation location = new IPLocation() {
            ZipPostalCode = xDoc.Element("Response").Element("ZipPostalCode").Value,
            Latitude = Double.Parse(xDoc.Element("Response").Element("Latitude").Value),
            Longitude = Double.Parse(xDoc.Element("Response").Element("Longitude").Value),
            City = xDoc.Element("Response").Element("City").Value,
            RegionName = xDoc.Element("Response").Element("RegionName").Value
          };
          Session[ipLocationCache] = location;
        }
        return Session[ipLocationCache] as IPLocation;
      }
    }

  }
}