CSHARP

unity destroy all children

while (transform.childCount > 0) {
    DestroyImmediate(transform.GetChild(0).gameObject);
}

Unity Children Destroy

 //put in any gameobject having children and enter playmode
        while (transform.childCount > 0)
        {
            DestroyImmediate(transform.GetChild(0).gameObject);
        }

unity how to destroy child

//Destroys the first child of the Parent variable
Destroy(Parent.transform.GetChild(0).gameObject);

Unity Destroy All Children

void Update()
    {
    //put in any gameobject having children and enter playmode
        foreach (Transform child in transform)
        {
            Destroy(child.gameObject);
        }
    }