public class CreateBatchViewModel
{
    private readonly List<GenericIdNameType> lines;

    public bool IsWizard { get; set; }

    public int ProductionOrderId { get; set; }

    public string ProductionOrderName { get; set; }

    [Display(Name = "BatchLine", ResourceType = typeof(Resources.Resources))]
    [Required(ErrorMessageResourceType = typeof(Resources.Resources),
            ErrorMessageResourceName = "BatchLineRequired")]
    public byte SelectedLineId { get; set; }

    public IEnumerable<SelectListItem> LineItems
    {
        get { return new SelectList(lines, "Id", "Name"); }
    }

    public List<Data.Batch> Batches { get; set; }

    public CreateBatchViewModel(bool isWizard) : this()
    {
        IsWizard = isWizard;
    }

    public CreateBatchViewModel()
    {
        lines = new List<GenericIdNameType>();
    }

    public CreateBatchViewModel(List<Data.Line> dataLines, bool isWizard)
    {
        IsWizard = isWizard;

        if (dataLines == null)
            throw new ArgumentNullException("dataLines");

        lines = new List<GenericIdNameType>(dataLines.Count);

        GenericIdNameType genericType = new GenericIdNameType()
        {
            Id = null,
            Name = string.Empty
        };

        lines.Add(genericType);

        foreach (Data.Line line in dataLines)
        {
            genericType = new GenericIdNameType()
            {
                Id = line.LineId.ToString(),
                Name = line.Name
            };

            lines.Add(genericType);
        }
    }
}