CSHARP

gameobject parent unity3d

public GameObject Child;
public Transform NewParent;

// Sets "newParent" as the new parent of the child GameObject.
Child.transform.SetParent(NewParent);

// Removes parent, puts child into a top-level object in the hierarchy
Child.transform.SetParent(null);

how to get parent gameobject in unity

childObject.transform.parent.gameObject

unity get parent object

// To get the parent object:
childObject.transform.parent.gameObject

parent unity

public gameobject player
public gameobject Newparent
player.transform.parent = newParent.transform;

unity get component in parent

void OnCollisionEnter(Collision collision)
{
PlayerController pl = collision.gameObject.GetComponentInParent<PlayerController>();
}