Hello !
I have two classes :
public class Slide : MonoBehaviour
{ protected bool _auto = false; }
public class VideoSlide : Slide
{}
The question is : How could I expose the variable “_auto” in the inspector only for VideoSlide objects in the scene ?
I tried to do a Custom Editor, like that :
[CustomEditor(typeof(VideoSlide))]
public class VideoSlideEditor : Editor
{
public override void OnInspectorGUI()
{
base.OnInspectorGUI();
var script = (VideoSlide)target;
script.Auto = EditorGUILayout.Toggle("Auto",script.Auto);
}
}
That works for exposing the variable in the editor, but when I press Play in the editor, the variable always go back to false even if i check the box !
Does someone know why ? 
Thanks for your help!