Actually the issue was, instead of opening the code behind file from Unity, I directly opened it in Visual Studio 2022.
I am able to import Scene Management directives when I open the code behind file from inside of Unity (and Unity in turn opens the file in Visual Studio 2022)

I am trying to switch scenes in Unity project Normally in projects without Noesis, switching scenes is done using following code using UnityEngine.SceneManagement; SceneManager.LoadScene(1) However, in the Noesis code behind I am working with, the .CS file doesn't recognize the code using UnityEngin...