How to access an instantiated game object using c# ?

hey there ,,, im trying to instantiate a Cylinder which is already in my assets as a prefab , then after its instantiated , i want to scale the clone , so i tried using an script attached on my Main Camera ,,, that part of the script for instantiating is like this :

    Public Transform Circle;
 ...
 public void instantiator (float radius , Vector3 Pos)
 {
    GameObject IC = GameObject.Instantiate(Circle,Pos,transform.Rotation) as GameObject;

  if(IC != null)

  IC.transform.localScale = new Vector3(radius , radius , 0f);

  else

  Debug.Log("there is nothing instantiated");
  }

... and when i instantiate it , it acts like there is nothing in the IC so it shows the message on console "there is nothing instantiated" ... is there a way to solve it , or , is there any way to access the instantiated GameObject ,,, i searched alot about it but none of those offered ways worked for me :(