在主线程处理对所有客户端的连接以及消息处理，是非常消耗时间的，所以对于监听客户端的连接，以及信息的接收，都额外开线程去处理，减轻主线程的压力

using System.Globalization;
using System.Net;
using System.Net.Sockets;
using System.Text;namespace TechTcpServerTest
{internal class Program{static Socket socket;static Socket socketClient;static List<Socket> socketClients = new List<Socket>();static void Main(string[] args){socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);try{IPEndPoint ipPoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 8080);socket.Bind(ipPoint);}catch (Exception){return;                }socket.Listen(1024);Thread threadAccept = new Thread(AcceptClientConnect);threadAccept.Start();Thread threadResive = new Thread(ReceiveMsg);threadAccept.Start();while(true){if (Console.ReadLine() != "Quit"){return;}for(int i = 0; i < socketClients.Count; ++i){socketClients[i].Shutdown(SocketShutdown.Both);socketClients[i].Close();}socketClients.Clear();Console.WriteLine("所有连接已断开，socket套接字关闭");break;}Console.ReadLine();}static void AcceptClientConnect(){while (true){socketClient = socket.Accept();socketClients.Add(socketClient);if (socketClient.RemoteEndPoint != null){socketClient.Send(Encoding.UTF8.GetBytes($"{socketClient.RemoteEndPoint.ToString()}客户端已成功连接服务器"));}}}static void ReceiveMsg(){int i;int num;byte[] receiveBuffer = new byte[1024];while(true){for(i = 0; i < socketClients.Count; ++i){if (socketClients[i].Available > 0){num = socketClients[i].Receive(receiveBuffer);ThreadPool.QueueUserWorkItem(HandleMsg, (socketClients[i], Encoding.UTF8.GetString(receiveBuffer, 0, num)));}}}}static void HandleMsg(object obj){(Socket s, string str)info = ((Socket s, string str))obj;if (info.s.RemoteEndPoint != null){Console.WriteLine($"收到来次{info.s.RemoteEndPoint.ToString()}的消息：{info.str}");}}}
}

启动服务端，在unity中启动客户端，客户端最基本的代码在上一节，发现依旧可以正常连接，本节处理完毕