iQQ.Net.WebQQCore.Im.Bean.QQCategory.GetQQBuddyByUin C# (CSharp) Method

        public QQBuddy GetQQBuddyByUin(int uin)
        {
            if (BuddyList.Count != 0 && uin != 0)
            {
                return BuddyList.FirstOrDefault(b => b.Uin == uin);
            }
            return null;
        }