Screen and Orientation checks events for Unity

ScreenOrientationCheck.cs

using System;
using UnityEngine;

public class ScreenOrientationCheck
{
    public static event Action<ScreenOrientation> onOrientationChange;
    public static ScreenOrientation lastOrientation;

    [RuntimeInitializeOnLoadMethod]
    private static void Init()
    {
        lastOrientation = Screen.orientation;
        OrientationChanged(lastOrientation);

        Debug.Log("Orientation: " + lastOrientation.ToString());
    }

    public static void CheckNewOrientation() //To call from Update in a Mono-Behaviour
    {
        if (Screen.orientation == lastOrientation) return;

        lastOrientation = Screen.orientation;
        OrientationChanged(lastOrientation);
    }

    private static void OrientationChanged(ScreenOrientation newOrientation)
    {
        if (onOrientationChange != null)
            onOrientationChange(newOrientation);
    }
}

ScreenSizeCheck.cs

// Based on: https://forum.unity.com/threads/window-resize-event.40253/

using System;
using UnityEngine;

public static class ScreenSizeCheck
{
    public static event Action onScreenSizeChange;

    public static Vector2 lastScreenSize { get; private set; }

    [RuntimeInitializeOnLoadMethod]
    private static void Init()
    {
        lastScreenSize = new Vector2(Screen.width, Screen.height);
        Debug.Log("Screen Size: " + lastScreenSize);
    }

    public static void CheckNewScreenSize() //To call from Update in a Mono-Behaviour
    {
        Vector2 screenSize = new Vector2(Screen.width, Screen.height);

        if (lastScreenSize == screenSize) return;

        lastScreenSize = screenSize;
        ScreenSizeChanged();
    }

    private static void ScreenSizeChanged()
    {
        if (onScreenSizeChange != null)
            onScreenSizeChange();
    }
}