How to get the name by id?

public ActionResult Stations_Read([DataSourceRequest]DataSourceRequest request)
  {
     IQueryable<Station> stations = db.Stations;
     DataSourceResult result = stations.ToDataSourceResult(request, station => new 
           {
              Id = station.Id,
              Code = station.Code,
              Name = station.Name,
              SubZone = new SubZone()
              {
                  Name = station.SubZone.Name // got error here.
              }
          });

          return Json(result);
      }

public class Station : Entity
   {
       public string Code { get; set; }
       public string Name { get; set; }
       public Guid SubZoneId { get; set; }
       public virtual SubZone SubZone { get; set; }
   }

SubZone = new SubZone()
       {
          Name = station.SubZone.Name // got error here.
       }