internal void Encode(AsnWriter writer, Asn1Tag tag)
{
writer.PushSequence(tag);
writer.PushSequence(new Asn1Tag(TagClass.ContextSpecific, 0));
UserId?.Encode(writer);
writer.PopSequence(new Asn1Tag(TagClass.ContextSpecific, 0));
writer.PushSequence(new Asn1Tag(TagClass.ContextSpecific, 1));
Checksum?.Encode(writer);
writer.PopSequence(new Asn1Tag(TagClass.ContextSpecific, 1));
writer.PopSequence(tag);
}