private IEnumerable <string> GetOutputRelatedDataObjects(IEnumerable <DataColumn> columns) { IEnumerable <string> variables = DDIHelper.GetOutputRawVariables(columns); return((from c in base.ProfileBuilder.Variables where variables.Contains(c.Name) && !string.IsNullOrWhiteSpace(c.DataObjectName) select c.DataObjectName).Distinct <string>()); }