Bug I'm not able to create a Drop Down menu with the languages

This is my code:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Localization;
using UnityEngine.UI;


public class LocaleDropdown : MonoBehaviour
{
public Dropdown dropdown;

IEnumerator Start()
{
// Wait for the localization system to initialize, loading Locales, preloading etc.
yield return LocalizationSettings.InitializationOperation;

// Generate list of available Locales
var options = new List<Dropdown.OptionData>();
int selected = 0;
for(int i = 0; i < LocalizationSettings.AvailableLocales.Locales.Count; ++i)
{
var locale = LocalizationSettings.AvailableLocales.Locales;
if (LocalizationSettings.SelectedLocale == locale)
selected = i;
options.Add(new Dropdown.OptionData(locale.name));
}
dropdown.options = options;

dropdown.value = selected;
dropdown.onValueChanged.AddListener(LocaleSelected);
}

static void LocaleSelected(int index)
{
LocalizationSettings.SelectedLocale = LocalizationSettings.AvailableLocales.Locales[index];
}
}


my error:
Assets\Scripts\Globals\LocaleDropdown.cs(34,47): error CS0103: The name 'LocalizationSettings' does not exist in the current context

 

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Localization.Settings;
using UnityEngine.UI;

public class LocaleDropdown : MonoBehaviour
{
public Dropdown dropdown;

IEnumerator Start()
{
// Wait for the localization system to initialize, loading Locales, preloading etc.
yield return LocalizationSettings.InitializationOperation;

// Generate list of available Locales
var options = new List<Dropdown.OptionData>();
int selected = 0;
for (int i = 0; i < LocalizationSettings.AvailableLocales.Locales.Count; ++i)
{
var locale = LocalizationSettings.AvailableLocales.Locales;
if (LocalizationSettings.SelectedLocale == locale)
selected = i;
options.Add(new Dropdown.OptionData(locale.name));
}
dropdown.options = options;

dropdown.value = selected;
dropdown.onValueChanged.AddListener(LocaleSelected);
}

static void LocaleSelected(int index)
{
LocalizationSettings.SelectedLocale = LocalizationSettings.AvailableLocales.Locales[index];

}
}