private void ValidatePrivateUse()
{
if (_privateUse.Contains("x"))
{
throw new ValidationException("Private Use tag may not contain 'x'");
}
_privateUse.ThrowIfSubtagContainsInvalidContent();
_privateUse.ThrowIfSubtagContainsDuplicates();
}
public bool VariantContains(string tagToFind)
{
return(_variant.Contains(tagToFind));
}