CFServer.listener2.userlogout C# (CSharp) Method

        private void userlogout(packet data, bool expected)
        {
            mutTable.WaitOne();
            if (_client_table.ContainsKey(data.Name))
            {
                try
                {
                    availableusers.Remove(data.Name);
                }
                catch { }

                string[] temp=null;
                foreach (string[] ss in match)
                {
                    if (ss.Contains(data.Name))
                    {
                        string oppo = (ss[0] == data.Name) ? ss[1] : ss[0];
                        packet p = new packet("q", null, null, 0, 0, 0, false);
                        sendPacket(oppo, p);
                        temp = ss;
                    }
                }
                try
                {
                    match.Remove(temp);
                }
                catch { }

                TcpClient client = _client_table[data.Name] as TcpClient;

                _client_table.Remove(data.Name);
                string msg = string.Format("{0} {1}，現在線上人數: {2} \n", data.Name, (expected ? "已離線" : "意外中止"), _client_table.Count);
                Console.WriteLine(msg);
                client.Close();
            }
            mutTable.ReleaseMutex();
        }