How to stage build actors in an actor chain/network

MyActor.cs

public class MyActor :
  Actor
{
  public MyActor(Inbox inbox)
  {
    inbox.Receive<InitMyActor>(initMsg =>
    {
      var myActorScopeValue = initMsg.Scope;

      inbox.Loop(loop =>
      {
        loop.Receive<UpdateMsg>(message =>
        {
          // do some work
          loop.Continue(); // this tells the loop to keep running
        }
        loop.Receive<SomeOtherMsg>(message =>
        {
          // do some work
          loop.Continue(); // this tells the loop to keep running
        }
      }
    }
  }
}