public class AchievementWrapper : ApiBase

public void GetASingleAchievement()
{
    Achievement achievement = GW2Api.V2().Achievements.Get(10);
}

public void GetASingleAchievementInASpecificLanguage()
{
    RequestedLanguage language = RequestedLanguage.de;
    Achievement achievement = GW2Api.V2().Colors.GetById(10, language);
}

public void GetAllAchievements()
{
    Dictionary<int, Lazy<Achievement>> allAchievements = GW2Api.V2().Achievements.GetAll();
}

public void GetMultipleAchievements()
{
    Dictionary<int, Lazy<Achievement>> multipleAchievements = GW2Api.V2().Achievements.GetMultiple(language, 10, 20, 40);
}