Question

If we have a Class

public class A
{
    public void resetValues()
    {
        //DoSomething
    }

    B b = new B();
}
public class B
{
    public B()
    {

    }

    void doSomething()
    {
        //Is there a way here to call A(the Creator) method resetValues();
        //Like Creator.resetValues();
    }
}

So is there a way to call the Creator methods like in this Example Class A method’s .
This is is very needful when i use a Form to show Another Form :
from FormA

FormB frmB = new FormB();
frmB.Show();
this.hide();

Than i should onFormClose Event of FormB to Show again the FormA

EDIT
First i thought parsing A by Ref as Object ,but Storing a Reference as a Field later i founded out that’s impossible !

First i thought maybe using reflection we can Identify and Call Creator method’s but i think i mismatched some of OOP Design Pattern’s

Answer 1

The only way is to pass in the “creator” when calling the constructor:

 B b = new B(this);

Of course, that means that B needs to have a constructor with the appropriate parameter type, which should match whatever it needs to do with its creator.

EDIT: As noted in comments, it doesn’t really need to be done at construction – it could be a property:

 B b = new B();
 b.Creator = this;

They amount to basically the same thing though.

I would suggest this is usually a bad idea, to be honest. It’s introducing a reasonably tight coupling between the two classes. It might be better for B to publish an event which the creator can subscribe to, in order to handle appropriate state changes etc on B.