How do i change the size of a Box Collider 2D in C#?

Questions & Answers
1

Hi Guys, I’m a beginner. I want to adjust a Box Collider 2D to the screen size, so my player object can’t get out of screen. I used the following code, but the size doesn’t change if I hit the play button, also the checkbox to enable or disable the script isn’t available. Answers to similar questions seem not work.

using UnityEngine;
using System.Collections;

    public class Frame : MonoBehaviour
    {
    
        // Use this for initialization
    
        BoxCollider2D bc;
    
        float height;
        float width;
    
        void start() {
            height = Screen.height;
            width = Screen.width;
            bc = this.GetComponent<BoxCollider2D>();
            bc.size = new Vector2 ( width, height);
            
         }
    }
2

bc.size = new Vector2(Camera.main.pixelWidth, Camera.main.pixelHeight);
Should help to you