Menu Manager (Unity C#) - Open / Close Menu by Key Press

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class MenuManager : MonoBehaviour {
    // Changed to GameObject because only the game object of the menu needs to be accessed, you can
    // change this to any class that inherits MonoBehaviour
    public GameObject optionsMenu;

    // Update is called once per frame
    void Update () {
        // Reverse the active state every time escape is pressed
        if (Input.GetKeyDown(KeyCode.Escape))
        {
            // Check whether it's active / inactive
            bool isActive = optionsMenu.activeSelf;

            optionsMenu.SetActive(!isActive);
        }
    }
}