CircularBuffer highly efficient implementation (both thread-safe and not thread-safe) [closed]

Not thread safe:

System.Collections.Generic.Queue

Thread safe:

System.Collections.Concurrent.ConcurrentQueue

or

System.Collections.Concurrent.BlockingCollection (which uses a concurrent queue by default internally)

Although technically you really shouldn’t use the term “thread safe”. It’s simply too ambiguous. The first is not designed to be used concurrently by multiple threads, the rest are.