public GameObject gameObj;//the gameobject you want to disable in the scene
gameObj.SetActive(true); //set the object to active
gameObj.SetActive(false);//set the object to disable
gameObject.SetActive(true);//change the state of the current gameobject to active
gameObject.SetActive(false);//change the state of the current gameobject to disable
Object.SetActive(true / false);
public void SetActive(bool value);