查重

bool isRepeat = input.SaleOutboundSettleDumpDetailList.GroupBy(x => new { x.OutStockFactoryCode }).Where(g => g.Count() > 1).Count() > 0;
                if (!isRepeat)
                {
                    var firstDump = input.SaleOutboundSettleDumpDetailList.First();
                    var company = await GetMainFactoryIsCompletionAsync(new GetCompanyCodeInput { CompanyCode = firstDump.OutStockFactoryCode, IsCompletion = false });
                    var customer = await GetMainFactoryIsCompletionAsync(new GetCompanyCodeInput { CompanyCode = firstDump.ArrivalFactoryCode, IsCompletion = true });
                    if (company.SalesCompanyCode != input.SaleOutboundSettle.CompanyCode)
                    {
                        throw new UserFriendlyException($"錯(cuò)誤, 您選擇的轉(zhuǎn)儲(chǔ)記錄中的出庫工廠與公司不對(duì)應(yīng)！");
                    }
                    if (customer.SalesCompanyCode != input.SaleOutboundSettle.CustomerCode)
                    {
                        throw new UserFriendlyException($"錯(cuò)誤, 您選擇的轉(zhuǎn)儲(chǔ)記錄中的入庫工廠與客戶不對(duì)應(yīng)！");
                    }
                }
                else
                {
                    throw new UserFriendlyException($"錯(cuò)誤, 您選擇的轉(zhuǎn)儲(chǔ)記錄,存在相同的出庫工廠，請重新選擇！");
                }