PKIT_AutonomousCars/Assets/Samples/Varjo XR Plugin/3.7.0/HDRP Samples/Shared/Scripts/QuitDemo.cs

using UnityEngine;

public class QuitDemo : MonoBehaviour
{
    public KeyCode quitDemo = KeyCode.Escape;
    void Update()
    {
        if (Input.GetKey(quitDemo))
        {
            Application.Quit();
        }
    }
}