Get all scene in unity

// Code snip to Get all scene in unity
public void UnlockNextLevel()
{
    int sceneCount = SceneManager.sceneCountInBuildSettings;
    string[] scenes = new string[sceneCount];
    for (int i = 0; i < sceneCount; i++)
    {
        scenes[i] = System.IO.Path.GetFileNameWithoutExtension(SceneUtility.GetScenePathByBuildIndex(i));
    }

    var nextSceneIndex = SceneManager.GetActiveScene().buildIndex + 1;

    if (nextSceneIndex <= sceneCount - 1 && scenes[nextSceneIndex].StartsWith("Level", StringComparison.Ordinal))
    {
        PlayerPrefs.SetString(scenes[nextSceneIndex], "unlocked");
    }
}