private BasicCommunicator CheckCommunicator(string unit, string communicator)
{
if (communicator == null)
{
throw new BasicWarehouseException(String.Format("{0} has CommunicatorName null.", unit));
}
if (!Communicator.ContainsKey(communicator))
{
throw new BasicWarehouseException(String.Format("{0} has unknown communicator {1}", unit, communicator));
}
return(Communicator[communicator]);
}