✅ System.NullReferenceException: 'Object reference not set to an instance of an object.'

private Data.Entities.Station MapStationFeatureToStation(StationDetailsContract sdc)
{
    return new Data.Entities.Station
    {
        Id = sdc.Id.ToString(),
        TmsNumber = sdc.Properties.TmsNumber,
        Name = sdc.Properties.Name,
        Names =
        {
            Fi = sdc.Properties.Names?.Fi ?? string.Empty,
            Sv = sdc.Properties.Names?.Sv ?? sdc.Properties.Names?.Fi ?? string.Empty,
            En = sdc.Properties.Names?.En ?? sdc.Properties.Names?.Fi ?? string.Empty
        },
        Coordinates =
        {
            Longitude = sdc.Geometry.Coordinates[0],
            Latitude = sdc.Geometry.Coordinates[1]
        },
        RoadNumber = sdc.Properties.RoadAddress.RoadNumber,
        RoadSection = sdc.Properties.RoadAddress.RoadSection,
        Carriageway = sdc.Properties.RoadAddress.Carriageway,
        Side = sdc.Properties.RoadAddress.Side,
        Municipality = sdc.Properties.Municipality,
        MunicipalityCode = sdc.Properties.MunicipalityCode,
        Province = sdc.Properties.Province,
        ProvinceCode = sdc.Properties.ProvinceCode,
        Direction1Municipality = sdc.Properties.Direction1Municipality,
        Direction1MunicipalityCode = sdc.Properties.Direction1MunicipalityCode,
        Direction2Municipality = sdc.Properties.Direction2Municipality,
        Direction2MunicipalityCode = sdc.Properties.Direction2MunicipalityCode,
        FreeFlowSpeed1 = sdc.Properties.FreeFlowSpeed1,
        FreeFlowSpeed2 = sdc.Properties.FreeFlowSpeed2,
        DataUpdatedTime = sdc.Properties.DataUpdatedTime
    };
}