Analogue of Queue.Peek() for BlockingCollection when listening to consuming IEnumerable

Question

I\'m using Pipelines pattern implementation to decouple messages consumer from a producer to avoid slow-consumer issue.

In case of any exception on a message processi

Answer 1

BlockingCollection is a wrapper around IProducerConsumerCollection, which is more generic than e.g. ConcurrentQueue and gives the implementer the freedom of not having to implement a (Try)Peek method.

However, you can always call TryPeek on the underlying queue directly:

ConcurrentQueue useOnlyForPeeking = new ConcurrentQueue();
BlockingCollection blockingCollection = new BlockingCollection(useOnlyForPeeking);
...
useOnlyForPeeking.TryPeek(...)

Note however that you must not modify your queue via useOnlyForPeeking, otherwise blockingCollection will get confused and may throw InvalidOperationExceptions at you, but I'd be surprised if calling the non-modifying TryPeek on this concurrent data structure would be an issue.