public async Task InitMachines() { var defaultMachines = _initRepository.GetDefaultMachines(); using (var trans = _unitOfWork.BeginTransaction()) { var userMachines = await _machineRepository.GetTracking(await _machineRepository.GetIdByUser(_userContext.UserId)); var sameMachines = userMachines.Join(defaultMachines, m => m.Name.ToLower(), m => m.Name.ToLower(), (m, _) => m); _machineRepository.DeleteRange(sameMachines); await _unitOfWork.SaveChangesAsync(); await _initRepository.AddDefaultMachines(_userContext.UserId); await CommitTransaction(trans); } }