Thread synchronization question

I am playing开发者_C百科 around with threads. I have a question and I think its a very basic one:

I have a class:

Class Message {
   public WriteMsg(string msg)
   {
      Console.Writeline(msg);
   }
}

I create an object of this class

Message msg = new Message();

Now I create ten threads and pass this message object to the function executed by the ten threads. Each will pass its thread index to the writemsg , which will be written out to stdout. I wrote and tested the application and its writing thread index 1 through 10.

As you can see I have not implemented no kind of synchronization. If the class is doing just the functionality mentioned above, do I need a lock mechanism when accessing the object in the threads ?

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You need synchronization among threads if they are working working with shared variables.
In your simple example there is no shared variable. So no synch is needed

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It depends on what you're doing if it's methods that modify or read from non-atomic objects than yes. For your case it's not necessary.