Array of pointer to objects [closed]

I'm using C#. I have a certain number of Newtonsoft.Json.Linq.JArray, let's say A1, A2, A3, and so on. I need to create an array or something similar of this objects in a way that, if I do something on one element of this array, is as doing in to my original objects. Thank you.

struct Product {
    public JArray A1;
    public JArray A2;
    public JArray A3;
    public JArray A4;
};
       
Product  obj=new Product();
       
JArray[] vj=new JArray[4]{obj.A1, obj.A2, obj.A3, obj.A4};

Now, I'm doing:

obj.A1=new JArray(){1,2,3,4,5};
obj.A1.Add("testo");

for every single object.

But I'd like to replace with something like this:

vj[0]=new JArray(){1,2,3,4,5};
vj[0].Add("testo");
vj[1]=new JArray(){3,5,2,3,4};
vj[1].Add("testo");
vj[2]=new JArray(){2,3,4,5,6};
vj[2].Add("testo");
vj[3]=new JArray(){2,2,3,4,5};
vj[3].Add("testo");

but if I do this, the original object, obj.A1 obj.A2 and so on, remain null. So I'm looking for a way to have, let's say, an array of pointers to JArray This is an example. I have a number (that is not fixed) of Ax and the operations that I have to do on every single object is the same. At the end, I'd like to replace the operations that are repetitive, with a for cycle applied to vj. But with this implementation, obj.A1, obj.A2 and so on, are not modified doing vj[i]=.... when I'm in debug, looking to the value of obj.A1 etc. all remain null, so I can't serialize obj at the end of all.

At the end, I have done in the following way and it works.

JArray*[] vj=new JArray*[4]{&obj.A1, &obj.A2, &obj.A3, &obj.A4};
for (i=0;i<4;i++)
{*vj[i]=new JArray(){1,2,3,4,5};
vj[i]->Add("testo");}

so, in the end, I can serialize my Product object. Thank you.