Top 20 NuGet concurrency Packages
You need a Akka.TestKit.* package! Add the one appropriate for the test framework you use instead. For example: Akka.TestKit.Xunit or Akka.TestKit.VsTest. This package only contains base functionality for writing tests for the Akka.NET framework.
Provides useful structures for performing efficient concurrent operations. Original Project: https://github.com/etishor/ConcurrencyUtilities, including a port of Java's LongAdder and Striped64 classes