如何从foreach循环中的linqQuery获取数组中的多个值？

Question

我想在foreach循环中执行的Array中获取查询结果，我有自定义类，但是每当我尝试将其保存在变量中时，它都会显示错误：无法将genriccustom类转换为我的自定义类var userName = HttpContext.Current.User.Identity.Name;                    var result = entities.USERS.SingleOrDefault(x => x.USER_NAME.Equals(userName, StringComparison.OrdinalIgnoreCase));                    var Result = (from p in entities.Apps where p.USERID == result.USERID select p).ToList();                    var children = new List<InsuredSummary>();                    foreach (var queryresult in Result)                    {                        var query_result = (from b in entities.USERS                                                // join c in entities.APP_INFORMATION on Result.INSURED_APPLICATION_ID equals c.INSURED_APPLICATION_ID                                                // join d in entities.APP_INFO_VEHICLE on Result.INSURED_APPLICATION_ID equals d.INSURED_APPLICATION_ID                                                //  join e in entities.APP_INFO_VEHICLE_OPTIONS_ACCESSORIES on Result.INSURED_APPLICATION_ID equals e.INSURED_APPLICATION_ID                                            join f in entities.Apps.Where(y => y.INSURED_APPLICATION_ID == queryresult.INSURED_APPLICATION_ID) on b.USERID equals f.USERID