How to completely unload scene loaded additively?

I have main scene, into which I load additively another scene.

That second scene I am unable to unloaded though using following code:

Code (CSharp):

1. SceneManager.UnloadSceneAsync(this.CurrentScene, UnloadSceneOptions.UnloadAllEmbeddedSceneObjects);

this.CurrentScene is a reference to the loaded scene struct.

Once unloading finished I also call Resources.UnloadUnusedAssets(); but it does not makes any difference, since whole hierarchy sits there like nothing happened.

I have only one object marked with "DontDestroyOnLoad" - in the main scene. The loaded scene does not have any such objects.

While in editor I am also unable to unload that scene - "Unload Scene" menu item is grayed out.

How to completely get rid of it?

2019.3.1f1.

Thanks,,
S.

 

Well, for all out there who would encounter such problems in the future: the whole thing was my fault: I believe that this was the reason - instead of just using SceneManager.LoadSceneAsync and providing it with the name of the scene, I was creating new Scene first with SceneManager.CreateScene which returned an empty one, of the same name.

Next I was calling LoadSceneAsync giving newly created scene as a parameter.

As a result I got two scenes present at the same name - empty one, and the actual one, loaded up from the assets.

Upon calling UnloadSceneAsync nothing was happening at all - I believe Unity did not expect to have two scenes of the same name, so did nothing or just failed silently, since no message was displayed.

Anyway, I hate you Unity for being such a shy girl, when it comes to problems, caused by users ;-)