Reference to an object is not updating the object

Question

Hi I am working with code that looks something like this .

class A
{
    Custom objA;

    public A()
    {
        //Assign some value to objA;
        B obj =          


        

Answer 1

Firstly, on line 5, you have a syntax error. You could do B obj = new B(objA) if you are trying to create a new instance of B. But I can only guess.

What it seems like you are trying to do is modify objA by having passed it into a new object of type B, storing it in a field, and then modifying the field. The problem is that what you are storing is a copy of a reference to objA. When you do this.objB = null, you are modifying the field objB to have a new reference (null), but you have not done anything to the field objA which is a member of the instance of class A.