/// <summary>
/// Returns the shipment by Id
/// </summary>
/// <param name="invoiceId">Shipment Id</param>
/// <returns>Shipment Dto model</returns>
public InvoiceDto GetById(int invoiceId)
{
var mapper = new MapperConfiguration(cfg => cfg.CreateMap <Invoice, InvoiceDto>()).CreateMapper();
Invoice invoice = (Invoice)invoicesRepository.GetById(invoiceId);
InvoiceDto invoiceDto = mapper.Map <InvoiceDto>(invoice);
invoiceDto.PostOperatorName = invoicesRepository.GetPostOperatorsIdNames()[invoice.PostOperatorId];
return(invoiceDto);
}