WarTornLands.Counter.CounterManager.CheckCounterAvailabillity C# (CSharp) Method

        private void CheckCounterAvailabillity(string id)
        {
            foreach (Counter c in _counters)
            {
                if (c.ID.Equals(id))
                    return;
            }

            throw new CounterIDNotRecognisedException(id);
        }