TLSharp.Core.Session.GetNewMessageId C# (CSharp) Method

        public long GetNewMessageId()
        {
            long time = Convert.ToInt64((DateTime.UtcNow - new DateTime(1970, 1, 1)).TotalMilliseconds);
            long newMessageId = ((time / 1000 + TimeOffset) << 32) |
                                ((time % 1000) << 22) |
                                (random.Next(524288) << 2); // 2^19
                                                            // [ unix timestamp : 32 bit] [ milliseconds : 10 bit ] [ buffer space : 1 bit ] [ random : 19 bit ] [ msg_id type : 2 bit ] = [ msg_id : 64 bit ]

            if (LastMessageId >= newMessageId)
            {
                newMessageId = LastMessageId + 4;
            }

            LastMessageId = newMessageId;
            return newMessageId;
        }