C# socket编程 出现 System.OutOfMemoryException 错误

问题描述：ListenClientConnect过程  Exception of type “System.OutOfMemoryException” was thrown.
运行环境：有100多个客户端，不出意外，长时间在线，心跳包是60秒一个，数据是5分钟一个
代码如下 之前出现过相似问题  加了GC.Collect();  但是还是没解决

 private void ListenClientConnect(object ServerSocket)
        {
            while (true)
            {
                try
                {
                    Socket socket = (Socket)ServerSocket;
                    Socket clientSocket = socket.Accept();
                    Thread receiveThread = new Thread(receivesocketmessage);
                    receiveThread.IsBackground = true;
                    receiveThread.Start(clientSocket);
                }
                catch (Exception er) { Wlog wlog = new Wlog(); wlog.errlog("ListenClientConnect" + " " + er.Message); GC.Collect(); }
            }
        }
 private void receivesocketmessage(object clientSocket)
        {
            Socket myClientSocket = (Socket)clientSocket;
            byte[] result=new byte[1024];
            DateTime dt = DateTime.Now;
            while (true)
            {
                try
                {
                    if ((DateTime.Now - dt).TotalSeconds > 70)
                    {
                        myClientSocket.Shutdown(SocketShutdown.Both);
                        myClientSocket.Close();
                        break;
                    } //根据超时时间结束线程
                    int receiveNumber = 0;
                    //通过clientSocket接收数据  
                    try
                    {
                        receiveNumber = myClientSocket.Receive(result);
                    }
                    catch (Exception er) 
                    {
                        Wlog wlog = new Wlog(); wlog.errlog("myClientSocket.Receive " + er.Message);
                        myClientSocket.Shutdown(SocketShutdown.Both);
                        myClientSocket.Close();
                        break;
                    }
                    //Console.WriteLine("接收客户端{0}消息{1}", myClientSocket.RemoteEndPoint.ToString(), Encoding.ASCII.GetString(result, 0, receiveNumber));
                    string str = "";
                    if (receiveNumber > 0)
                    {
                        dt = DateTime.Now;
                          for (int i = 0; i < receiveNumber; i++)
                            { str += result[i].ToString("X").PadLeft(2, "0"); }
                            jiexiPara jp = new jiexiPara(str, DateTime.Now, 1, "");
                            baowenjiexi(jp, clientSocket);
                    }
                }
                catch (Exception er) { Wlog wlog = new Wlog(); wlog.errlog("receivesocketmessage "+er.Message); }
                //Thread.Sleep(80);
            }
            GC.Collect();
        }