C# .net cf 3.5 IDisposable disposing objects

Question

Hi
my problem is with memory leaks..... i would like to know how to use dispose, IDisposable interface...
my current problem is:
have: 1 controller class, 1 from (for simpliticy, also have 1 controller - 3 forms)

so..for example if i click to a menu elment that make the controller (the controller download or just build up what need to be in the screen, when it is finished i open the form) what is the best practice when i close the form to release the controller too ?
maybe i`m a little not so understandable so here is a litte mockup...

Controller:
private DataFrom dataform = null;
//other local variables (hashtables, objects written by me)

//constructor
public Controller()
{
this.dataform = new DataForm(this);
}

public init()
{
//building the form
ex: datafrom.listview1.item.add(...) etc....
dataform.show();
}

Form:
in the form cunstructor i pass the controller

i would like to ask how i can realease the controller and clean up the objects what i used before to build up the form....
till now i used in the form closing method... controller = null;
i bet it is not working cuz after closing the form have much more allocated memory then before.....

anybody can tell me the best practice for free up a memory in this current case ????
thx

naura pax · Answer

Managed resources are .net objects that are defined within dotnet framework like instances of classesstructs etc while unmanaged resources are pointers to external resources like Files connections etc. You can call dispose method on form button close event. please mark accepted if useful.

Alex · Answer

thx for your reply i started to implement IDisposabel interface.... just another question.... exactly how i can determine what is unmanaged or managed resource because i`m not sure.... it is acceptable if i call the the controller.Dispose() in the form exit button and close the form in the controller Dispose().... or how i can do it ??

naura pax · Answer

you can implement IDisposable in your controller class like this: public class GoodResourceCitizen : IDisposable { private bool _IsDisposed = false ; ~GoodResourceCitizen() { Dispose( false ); } public void Dispose() { Dispose( true ); // Tell the garbage collector not to call the finalizer // since all the cleanup will already be done. GC.SuppressFinalize( true ); } protected virtual void Dispose( bool IsDisposing) { if (_IsDisposed) return ; if (IsDisposing) { // Free any managed resources in this section } // Free any unmanaged resources in this section _IsDisposed = true ; } }

C# .net cf 3.5 IDisposable, disposing objects