// Create ActorSystem
var actorSystem = akkaService.CreateActorSystem();
// Create Actor
var currentActor = actorSystem.ActorOf(Props.Create<BasicActor>(), actorName);
// Send Message
currentActor.Tell(new MessageCommand("Hello"));
// Actor Implement
public class BasicActor : ReceiveActor
{
    private readonly ILoggingAdapter logger = Context.GetLogger();
    private IActorRef testProbe;
    public BasicActor()
    {
        ReceiveAsync<IActorRef>(async actorRef =>
        {
            testProbe = actorRef;
            testProbe.Tell("done");
        });
        ReceiveAsync<MessageCommand>(async msg =>
        {
            if (testProbe != null)
            {
                testProbe.Tell(msg.Message);
            }
            else
            {
                Sender.Tell(msg.Message);
            }
        });            
    }
}