Heaven,
It's quite deliberate that we're forcing you to filter by either date (Account.GetEntriesByDate()) or serial number (Account.GetEntriesByNumber()).
However, if you know that e.g. you're syncing the account for the first time - and thus aren't downloading data which you've sync'ed before - you CAN of course either specify a sufficiently broad date interval, or retrieve by (1, Int32.Max) number.
It's quite deliberate that we're forcing you to filter by either date (Account.GetEntriesByDate()) or serial number (Account.GetEntriesByNumber()).
However, if you know that e.g. you're syncing the account for the first time - and thus aren't downloading data which you've sync'ed before - you CAN of course either specify a sufficiently broad date interval, or retrieve by (1, Int32.Max) number.