public void ParseMexicanSpanishTag()
{
var tag = LanguageTag.Create(Language.Spanish, Country.Mexico);
Assert.IsNotNull(tag);
Assert.AreNotEqual(LanguageTag.Empty, tag);
Assert.AreEqual(Language.Spanish, tag.PrimaryLanguage);
Assert.AreEqual(Country.Mexico, tag.Country);
Assert.AreEqual("es-MX", tag.ToString());
}