public void Test() { Console.WriteLine("Testing database"); _model = new BBModel(); int lastSN = _model.GetLastSN(); Console.WriteLine("Current last SN:{0}", _model.GetLastSN()); var newLastSN = _model.ReserveSNRange(3); Console.WriteLine("Resered 3 serial numbers. From {0} to {1}", newLastSN - 3, newLastSN); //_model.SetLastSN(lastSN); }