private void checkConstruction(
Restriction restriction,
DirectoryString res)
{
checkValues(restriction, res);
restriction = Restriction.GetInstance(restriction);
checkValues(restriction, res);
Asn1InputStream aIn = new Asn1InputStream(restriction.ToAsn1Object().GetEncoded());
IAsn1String str = (IAsn1String)aIn.ReadObject();
restriction = Restriction.GetInstance(str);
checkValues(restriction, res);
}