How to make a JOIN in LINQ to SQL equivalent to Not Equals

Question

I've got a table: Year | Period | Account

During a new period, I'd like to get a list of new accounts and a list of accounts that also existed in the prior period.

Accounts that are also in the prior period:

    bs.DataSource = from c in accountsToImport
             join p in accountsToImport on c.Account equals p.Account
             where c.Year == year && c.Period == period
             && p.Year == priorYear && p.Period == priorPeriod
             select c;
    return bs;

However, I can't figure out how to get the equivalent of " not equals p.account " with LINQ->SQL. The SQL command that does work:

select * from tsr_accountsToimport as cper
inner join tsr_accountstoimport as pper
on cper.account <> pper.account
where 
cper.year = 2015
and cper.period = 4
and pper.period = 3

Any help to get the LINQ syntax would be greatly appreciated. Thanks!

Answer 1

You can try SelectMany instead of join.

from c in accounts
from p in accounts
where c.Account != p.Account