在C＃5 /异步CTP中实现Actor模型

 let message_loop() = 
     let! message = receive_message() //sync receive message
     match message with
     | Foo(a,b) -> DoStuff(a,b)
     | Bar(c) -> DoOtherStuff(c)
     | _ -> error (\"unknown message\")
     message_loop()

class MyActor 
{
   //message signature Foo(a,b)
   public void Foo(int a,string b)
   {
      Act( () => DoStuff(a,b) );
   }

   //message signature Bar(c)
   public void Bar(int c)
   {
      Act( () => DoOtherStuff(c));
   }

   // the rest is infrasturcture code, can be refactored into an Actor Base class


   //this emulates the sync behavior of the above actor
   //each action is pushed onto a queue 
   //and then processed synchronously by the message handler
   private void Act(Action action)
   {
       actions.Post(action); 
   }

   private BufferBlock<Action> actions = new BufferBlock<Action>();

   //this needs max degreee of parallellism = 1 
   private ActionBlock<Action> messageHandler = new ....
}