how to make an object disappear when hit by something unity code example

Example 1: make an object disappear from a c# script unity

public GameObject ObjectToDisappear;

void Start()
{
	ObjectToDisappear.GetComponent<Renderer>().enabled = false;
}

Example 2: how to make an object appear and disappear in unity

void Update() {
   if (Input.GetMouseButtonDown(0)) {
     gameObject.active = true;
   }
   if (Input.GetMouseButtonDown(1)) {
     gameObject.active = false;
   }
 }