Unity runtime scriptable object

RuntimeScriptableObject.cs

using UnityEngine;
#if UNITY_EDITOR
using UnityEditor;
#endif

public class RuntimeScriptableObject : ScriptableObject
{
#if UNITY_EDITOR
    string serializedEditorState;
#endif

    protected virtual void OnEnable()
    {
#if UNITY_EDITOR
        EditorApplication.playModeStateChanged += OnPlayModeStateChanged;
#endif
    }

    protected virtual void OnDisable()
    {
#if UNITY_EDITOR
        EditorApplication.playModeStateChanged -= OnPlayModeStateChanged;
#endif
    }

#if UNITY_EDITOR
    void OnPlayModeStateChanged(PlayModeStateChange mode)
    {
        switch (mode)
        {
            case PlayModeStateChange.ExitingEditMode:
                serializedEditorState = JsonUtility.ToJson(this);
                break;

            case PlayModeStateChange.ExitingPlayMode:
                JsonUtility.FromJsonOverwrite(serializedEditorState, this);
                break;
        }
    }
#endif
}