UnityEngine.SceneManagement.SceneManager.UnloadSceneNameIndexInternal C# (CSharp) Method

        private static extern AsyncOperation UnloadSceneNameIndexInternal(string sceneName, int sceneBuildIndex, bool immediately, out bool outSuccess);

        public static bool UnloadScene(string sceneName)
        {
            bool result;

            SceneManager.UnloadSceneNameIndexInternal(sceneName, -1, true, UnloadSceneOptions.None, out result);
            return(result);
        }