在DATATABLE中过滤相同的值

 var distinctValues = dtOnStorage.AsEnumerable()
                            .Select(row => new
                            {
                                product = row.Field<string>("WHITE_PART_EQP")
                            }).Distinct();

                        string product = "";
                        foreach (var item in distinctValues)
                        {
                            product = item.product + ",";
                        }