public SeminarAttendee UnRegisterAttendee(UnRegisterAttendeeAtSeminar cmd)
{
var attendeeToRemove = RegisteredAttendees.FirstOrDefault(attendee => attendee.Id == cmd.AttendeeId);
if (attendeeToRemove == null)
{
throw new ObjectNotFoundException(cmd.AttendeeId, typeof(SeminarAttendee));
}
RegisteredAttendees.Remove(attendeeToRemove);
return(attendeeToRemove);
}
public async Task UnRegisterAttendeeAsync(UnRegisterAttendeeAtSeminar cmd)
{
cmd.Validate();
var seminar = await _seminarDao.GetAsync(cmd.Id);
if (seminar == null)
{
throw new ObjectAlreadyExitsException(cmd.Id, typeof(Seminar));
}
await _seminarDao.RemoveAttendeeAsync(seminar.UnRegisterAttendee(cmd));
}
