/// <summary>
/// Returns the hierarchy of the specific culture, the neutral culture, and the invariant culture for the <paramref name="cultureInfo"/>.
/// </summary>
public static IEnumerable <CultureInfo> GetCultureHierarchy(this CultureInfo cultureInfo)
{
ArgumentUtility.CheckNotNull("cultureInfo", cultureInfo);
// CultureInfo.Parent is defined as specific -> neutral -> invariant, with invariant being its own parent
return(cultureInfo
.CreateSequence(ci => ci.Parent, ci => !ci.Equals(CultureInfo.InvariantCulture))
.Concat(CultureInfo.InvariantCulture));
}