For determining whether the collection contains any items, use of this property is recommended rather than retrieving the number of items from the ConcurrentStack`1.Count property and comparing it to 0. However, as this collection is intended to be accessed concurrently, it may be the case that another thread will modify the collection after ConcurrentStack`1.IsEmpty returns, thus invalidating the result.

For a code example, see System.Collections.Concurrent.ConcurrentStack`1.