Cast and map

[ChildActionOnly]
public Expression<Func<TModel, dynamic>>[] GetMapping<TModel>()
{
    Expression<Func<TModel, dynamic>>[] map = null;
    Type modelType = typeof(TModel);

    object auxMap = null;
    if (modelType == typeof(AssiduityCodesViewModel))
    {
        auxMap =
            CSVMapper.RawMap<AssiduityCodesViewModel>(
                x => x.AssiduityCode
                , x => x.AssiduityCodeErp
                , x => x.AssiduityTypeCode
                , x => x.AssiduityCodeDesc
                , x => x.CompanyName
                , x => x.Vacation
                , x => x.NeedsProof
                , x => x.Active
            );
    }
    else if (modelType == typeof(HolidayViewModel))
    {
        auxMap =
            CSVMapper.RawMap<HolidayViewModel>(
                x => x.HolidayId
                , x => x.HolidayTypeCode
                , x => x.HolidayDay
                , x => x.CompanyCode
                , x => x.MunicipalityCode
                , x => x.CountyCode
                , x => x.CountryCode
                , x => x.Description
                , x => x.YearPlanner
                , x => x.FixedHoliday
                , x => x.Active
            );
    }
    else if (modelType == typeof(HolidayTypeViewModel))
    {
        auxMap =
            CSVMapper.RawMap<HolidayTypeViewModel>(
                x => x.IdHolidayTypeCode
                , x => x.Description
                , x => x.Active
            );
    }
    else if (modelType == typeof(FringeBenefitsViewModel))
    {
        auxMap =
            CSVMapper.RawMap<FringeBenefitsViewModel>(
                x => x.Code
                , x => x.CompanyCode
                , x => x.ErpCode
                , x => x.Description
                , x => x.Value
                , x => x.Limit
                , x => x.IsActive
            );
    }
    else if (modelType == typeof(RelativeViewModel))
    {
        auxMap =
            CSVMapper.RawMap<RelativeViewModel>(
                x => x.RelativeCode
                , x => x.CompanyCode
                , x => x.ErpCode
                , x => x.Description
                , x => x.Active
            );
    }
    else if (modelType == typeof(CountyViewModel))
    {
        auxMap =
            CSVMapper.RawMap<CountyViewModel>(
                x => x.CountyCode
                , x => x.CountryCode
                , x => x.ErpCode
                , x => x.Description
                , x => x.Active
            );
    }
    else if (modelType == typeof(CountryViewModel))
    {
        auxMap =
            CSVMapper.RawMap<CountryViewModel>(
                x => x.CountryCode
                , x => x.ErpCode
                , x => x.Description
                , x => x.Active
            );
    }
    else if (modelType == typeof(RequestTypeViewModel))
    {
        auxMap =
            CSVMapper.RawMap<RequestTypeViewModel>(
                x => x.Id
                , x => x.Name
                , x => x.Description
                , x => x.CompanyCode
                , x => x.Active
            );
    }
    else if (modelType == typeof(FinancialOfficeViewModel))
    {
        auxMap =
            CSVMapper.RawMap<FinancialOfficeViewModel>(
                x => x.FinancialOfficeCode
                , x => x.ErpCode
                , x => x.Description
                , x => x.CompanyCode
                , x => x.Active
            );
    }
    else if (modelType == typeof(IncomeCategoryViewModel))
    {
        auxMap =
            CSVMapper.RawMap<IncomeCategoryViewModel>(
                x => x.IncomeCategoryCode
                , x => x.ErpCode
                , x => x.Description
                , x => x.CompanyCode
                , x => x.Active
            );
    }
    else if (modelType == typeof(IdCardTypeViewModel))
    {
        auxMap =
            CSVMapper.RawMap<IdCardTypeViewModel>(
                x => x.IdCardTypeCode
                , x => x.ErpCode
                , x => x.Description
                , x => x.CompanyCode
                , x => x.Active
            );
    }
    else if (modelType == typeof(DistrictViewModel))
    {
        auxMap =
            CSVMapper.RawMap<DistrictViewModel>(
                x => x.DistrictCode
                , x => x.ErpCode
                , x => x.Description
                , x => x.CountryCode
                , x => x.Active
            );
    }
    else if (modelType == typeof(MunicipalityViewModel))
    {
        auxMap =
            CSVMapper.RawMap<MunicipalityViewModel>(
                x => x.MunicipalityCode
                , x => x.ErpCode
                , x => x.Description
                , x => x.CountryCode
                , x => x.Active
            );
    }
    else if (modelType == typeof(ResidenceViewModel))
    {
        auxMap =
            CSVMapper.RawMap<ResidenceViewModel>(
                x => x.ResidenceCode
                , x => x.ErpCode
                , x => x.Description
                , x => x.CompanyCode
                , x => x.Active
            );
    }
    else if (modelType == typeof(CategoryViewModel))
    {
        auxMap =
            CSVMapper.RawMap<CategoryViewModel>(
                x => x.CategoryCode
                , x => x.ErpCode
                , x => x.Description
                , x => x.CompanyCode
                , x => x.Active
            );
    }
    else if (modelType == typeof(AccountTypeViewModel))
    {
        auxMap =
            CSVMapper.RawMap<AccountTypeViewModel>(
                x => x.AccountTypeCode
                , x => x.ErpCode
                , x => x.Description
                , x => x.CompanyCode
                , x => x.Active
            );
    }
    else if (modelType == typeof(CurrentAccountTypeViewModel))
    {
        auxMap =
            CSVMapper.RawMap<CurrentAccountTypeViewModel>(
                x => x.CurrentAccountTypeCode
                , x => x.AccountTypeCode
                , x => x.ErpCode
                , x => x.Description
                , x => x.CompanyCode
                , x => x.Active
            );
    }
    else if (modelType == typeof(MaritalsViewModel))
    {
        auxMap =
            CSVMapper.RawMap<MaritalsViewModel>(
                x => x.MaritalCode
                , x => x.IrsMaritalCode
                , x => x.ErpCode
                , x => x.Description
                , x => x.CompanyCode
                , x => x.Active
            );
    }
    else if (modelType == typeof(IRSMaritalsViewModel))
    {
        auxMap =
            CSVMapper.RawMap<IRSMaritalsViewModel>(
                x => x.IrsMaritalCode
                , x => x.ErpCode
                , x => x.Description
                , x => x.CompanyCode
                , x => x.Active
            );
    }
    else if (modelType == typeof(CitiesViewModel))
    {
        auxMap =
            CSVMapper.RawMap<CitiesViewModel>(
                x => x.CityCode
                , x => x.ErpCode
                , x => x.Description
                , x => x.CountryCode
                , x => x.Active
            );
    }
    else if (modelType == typeof(BankListViewModel))
    {
        auxMap =
            CSVMapper.RawMap<BankListViewModel>(
                 x => x.BankCode
                , x => x.SwiftCode
                , x => x.ErpCode
                , x => x.Description
                , x => x.CompanyCode
                , x => x.Active
            );
    }

    Type type = typeof(Expression<Func<TModel, dynamic>>[]);
    map = (Expression<Func<TModel, dynamic>>[])Convert.ChangeType(auxMap, type);

    return map;
}