public RosterItem(Account account, string jid, string name, string group, string subscription)
{
Initialize(account, jid, name, group, subscription);
}
public void Initialize(Account account, string jid, string name, string group, string subscription)
{
_account = account;
Jid = jid;
Name = name;
Group = group;
Subscription = subscription;
MarkOffline();
}