Can not view database records

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C#

SQL

LINQ

database

Hi. i can not view database records.
i have a database (appuser), i create in code a new user and insert it there.
when i try to find a user with an email by using this code:

AppDatabaseDataContext db = new AppDatabaseDataContext();
                return (from rows in db.AppUser
                        where rows.Email.Trim().ToLower() == email.Trim().ToLower()
                        select rows).FirstOrDefault();

it returns a user with specified email.
when i open my database in visual studio, there are no records in it.
when i try to add a new record via visual studio and then call

select * from appuser

it returns only record, that i have created via visual studio (database wizard)
any ideas how to fix this?