I searched a lot find a solution to discard all changes, now i got.

it was really helpful

thanks

begin trans
insert
update (of inserted record)
*
commit trans

in case of failure, all changes should be discarded.

However since all actions are inside transaction, on failure the insert is rolled back, and there is no way to fetch the data back to record to discard update. As the result of DiscardChanges I get exception from Linq about non existing record.

I can make a workaround for this particular case, but it would be great if someone had an idea for general, smart solution.

// here setting all the values of the record

// here discard may occur (+jump off the procedure)

and despite the loop iterates through this table it does not discard changes.

As a workaround I introduced new bool value which tracks if this is new record or just edit, and just before submit I add

// here discard may occur (+jump off the procedure)
if (is_insert)
db.Table.InsertOnSubmit(record);

This works, but thanks to not using discarding inserts.

If encapsulation is what you’re worried about, just make a functions that calls DiscardInsertsAndDeletes and DiscardUpdates.