gistfile1.cs

public class AddNewAssetTypeSelectionViewValidator : Validator<IAddNewAssetTypeSelectionView>
    {
        public AddNewAssetTypeSelectionViewValidator(SiteDeviceConfig siteDeviceConfig)
        {
            RegisterValidation(new Validation<IAddNewAssetTypeSelectionView>()
                                   .ValidateThat(view => view.AssetClassificationList.HasProductCodeSelected())
                                   .When(() => siteDeviceConfig.ShowProductCode)
                                   .WithMessage(Resources.ProductCode, Resources.ProductCodeNotSelected));

            RegisterValidation(new Validation<IAddNewAssetTypeSelectionView>()
                                   .ValidateThat(view => view.AssetClassificationList.HasAssetTypeSelected())
                                   .When(() => !siteDeviceConfig.ShowProductCode)
                                   .WithMessage(Resources.AssetType, Resources.AssetTypeNotSelected));

            RegisterValidation(new Validation<IAddNewAssetTypeSelectionView>()
                                   .ValidateThat(view => view.OwnershipList.HasItemSelected)
                                   .WithMessage(Resources.Ownership, Resources.OwnershipNotSelected));
        }
    }