Detach particle system from object

Questions & Answers
1

Is there any way to detach my particle system (to prevent him from disappear when the object is destroy)?

    private void OnCollisionEnter2D(Collision2D collision)
    {
        //particle detach?
        Destroy(gameObject);
    }
2

I tried GetComponent().transform.parent = null; but seems to not work.

3

you can add your particle system to an empty child.
and just before destroying your object, you can detach that child from its parent like this :

childObjet..transform.parent = null;