Unity2D Screen size

Still messing with Unity 2D and wanted to make a note on now to find the screen size and the upper left coordinate. This will be something I need for every game.

using UnityEngine;
using System.Collections;

public class ScreenSize : MonoBehaviour 
{
  void Start()
    {
    float ScreenHeight = Camera.main.orthographicSize*2;
    float SceenWidth = Camera.main.aspect * camHalfHeight; 

    // Set a new vector to the top left of the scene 
    Vector3 topLeftPosition = new Vector3(-ScreenWidth/2, ScreenHeight/2, 0) + Camera.main.transform.position;
    }
}