using FooService.Data.BarServiceReference;

public class FooData : IFooData
{
    public BarDto Func1(int id)
    {
        try
        {
            using (BarServiceClient client = new BarServiceClient())
            {
                return client.GetBar(id);
            }
        }
        catch (System.ServiceModel.FaultException ex)
        {
            throw new Exception($"Inner exception in BarServiceClient: { ex.Message }", ex);
        }
    }
}

public class FooLogic
{
    private IMapper Mapper { get; }
    private IFooData FooData { get; }
    public FooLogic(IMapper mapper, IFooData fooData)
    {
        Mapper = mapper;
        FooData = fooData;
    }

    public Bar GetBar(int id)
    {
        BarDto barDto = FooData.Func1(itemId);
        Bar bar = Mapper.Map<BarDto, Bar>(barDto);

        // There are lot more, taken from the Data layer.
        // Some operations are performed.  The Bar is basically modified a little bit/adjusted



        return bar;
    }
}