Why is SceneManagement not connected?

Question

C++ / C#

I write however SceneManagement using UnityEngine.SceneManagement;
is underlined in red, ie. the library is not included. What to do?

Answer 1

Library not connected UnityEngine.CoreModule
Causes:
- Very old version of the engine. (In older versions, like before version 2017.X, there was no modularity)
- The project was not generated by the engine (it's stupid to create a library and connect the UnityEngine reference - it will not be enough)
https://docs.unity3d.com/ScriptReference/SceneMana...