public MessageHeader(int uid, Folder f)
{
if (uid < 0)
{
throw new System.ArgumentException("Invalid UID Value", "uid");
}
folder_ = f;
Uid = uid;
id = uid; // Set this as a default, but the server might update it.
flags_ = new BehaviorSubject <MessageFlags>(MessageFlags.None);
UnRead = flags_.Select((flags) => flags.HasFlag(MessageFlags.Seen) == false);
Deleted = flags_.Select((flags) => flags.HasFlag(MessageFlags.Deleted));
Flagged = flags_.Select((flags) => flags.HasFlag(MessageFlags.Flagged));
UnRead.Subscribe(val => IsUnRead = val);
Deleted.Subscribe(val => IsDeleted = val);
attachments_ = new List <BodyPart>();
related_ = new List <BodyPart>();
To = new MailAddressCollection();
Cc = new MailAddressCollection();
// Build the BodyPart required to pull the whole message.
FullMessage = new BodyPart(this, "text/plain");
FullMessage.PartNumber = "";
}