public static void TwoLetterCodeExists5() => Assert.True(CountryISOCodes.TwoLetterCodeExists("FR"));
public static void TwoLetterCodeExists4() => Assert.False(CountryISOCodes.TwoLetterCodeExists("ZZ"));
public static void TwoLetterCodeExists2() => Assert.False(CountryISOCodes.TwoLetterCodeExists(String.Empty));
public static void TwoLetterCodeExists3(string value) => Assert.False(CountryISOCodes.TwoLetterCodeExists(value));
public static void TwoLetterCodeExists1() => Assert.False(CountryISOCodes.TwoLetterCodeExists(null));