[Firebird-net-provider] Using @ character in an sql string

[Halil A. <av...@ho...>]

When I use "@" char in my query which is an sql string.
Provider replaces the word which starts with @, assumes as a parameter.
Is there anything to escape or any work around?

                SELECT NAME, SURNAME FROM TBLUSERS WHERE EMAIL =
'av...@do...'
Becomes     SELECT NAME, SURNAME FROM TBLUSERS WHERE EMAIL = 'avci?.com'


_command = new FbCommand( sql, _connection);
_connection.Open();
_reader = _command.ExecuteReader();