Setting Object=Null sets it's child objects?

Question

Hi
I have defined a class like
public class CSBusinessLogic
    {
        private CommonServiceDA commonServiceDA = new CommonServiceDA();
      
        public List<string> GetStates()
        {
            return commonServiceDA.GetStates();
        }    
     
        public StateCollection GetStatesOnLoad()
        {
            return commonServiceDA.GetStatesOnLoad();
           
        }
}

Now in my different  WCF methods i am creating an object of CSBusinessLogic and using it's methods. and after that setting it to null value.
CSBusinessLogic ObjBusinessLogic  = new CSBusinessLogic();
.
.
.
ObjBusinessLogic = null;

i would like to know once i set the parent object to null value, does it's child object (here commonServiceDA ) also to null value. or should i set it's child value also to null value, before setting parent object. I have thousands of wcf methods. If people start using it is there anyway to avoid memory leak? whats the best practice

       

Answer 1

They don't return to null but as you remove all of the references to the parent object it becomes eligible for garbage collection.  Once removed its child objects will also become unrefrfenanced and then will be cleaned up themselves.

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A programmer Trapped in a thugs body

Answer 2

Hi,

All unreachable objects are going to be GCed in a GC operation, and unreachable means an object is not reference directly or indirectly by the Root ( the Root includes global variables, static variables, etc).

Here are some articles talking about GC related topic, hope they can help:

http://www.codeproject.com/KB/aspnet/DONETBestPracticeNo2.aspx

http://www.codeproject.com/KB/dotnet/BestPractices5.aspx

 

Thanks,

Eric

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