public void SystemStopTest()
{
var actf = new ActorSystem();
var act1 = actf.CreateActor<ChildStopRestartActor>("parent");
var act2 = act1.Ask<ActorRef>(new createchildactormsg()).Result;
var act3 = actf.FindActorByPath("\\user\\parent\\child");
Assert.AreEqual(act3, act2);
actf.StopSystem();
act3 = actf.FindActorByPath("\\user\\parent\\child");
Assert.IsNull(act3);
}