Simulation.cs

static void Main(string[] args)
{
    ActorSystem system = ActorSystem.Create("rubikscode");

    IActorRef blogActor = system.ActorOf(Props.Create(typeof(BlogActor)), "blog");

    blogActor.Tell(new StartedReadingMessage("NapoleonHill", "Tuples in .NET world and C# 7.0 improvements"));

    // Used for simulation.
    Thread.Sleep(1000);

    blogActor.Tell(new StartedReadingMessage("VictorPelevin", "How to use “Art of War” to be better Software Craftsman"));

    // Used for simulation.
    Thread.Sleep(1000);

    blogActor.Tell(new StopedReadingMessage("NapoleonHill", "Tuples in .NET world and C# 7.0 improvements"));

    // Used for simulation.
    Thread.Sleep(500);

    blogActor.Tell(new StopedReadingMessage("VictorPelevin", "How to use “Art of War” to be better Software Craftsman"));

    Console.ReadLine();
}