public OperationViewModel(OperationViewModel model, int annexNumber)
 {
     IsAnnexProvided = model.IsAnnexProvided;
     reasonForExport = model.ReasonForExport;
     OperationCodes = model.OperationCodes;
     technologyEmployedDetails = model.TechnologyEmployedDetails;
     furtherDetails = model.FurtherDetails ?? string.Empty;
     annexProvided = GetAnnexProvidedText(model, annexNumber);
 }
        private string GetAnnexProvidedText(OperationViewModel model, int annexNumber)
        {
            var text = string.Empty;

            if (model.IsAnnexProvided || !string.IsNullOrEmpty(model.FurtherDetails))
            {
                text = "See Annex " + annexNumber;
            }

            return text;
        }