how to get next scene in unity code example

Example 1: unity load next scene

//for unity c#
using UnityEngine.SceneManagement;
.....
SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex + 1);

Example 2: unity next scene

//For C# in unity
UnityEngine.SceneManagement;
....
SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex + 1);