iQQ.Net.WebQQCore.Im.Core.QQStore.SearchUserByUin C# (CSharp) Method

        public QQUser SearchUserByUin(long uin)
        {
            var user = GetBuddyByUin(uin) ?? (QQUser)GetStrangerByUin(uin);
            if (user == null)
            {
                foreach (var group in _groupMap.Values)
                {
                    return group.Members.FirstOrDefault(u => u.Uin == uin);
                }
                foreach (var discuz in _discuzMap.Values)
                {
                    return discuz.Members.FirstOrDefault(u => u.Uin == uin);
                }
            }
            return user;
        }