用c#写个基于socket的简易聊天项目

非常感谢您的问题。以下是一个基于 Socket 的简易聊天项目的示例代码：

服务端代码：

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

public class Server {
    public static void Main () {
        // 建立服务端 Socket，监听本地 IP 地址和指定端口号
        Socket serverSocket = new Socket (AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        IPEndPoint ipEndPoint = new IPEndPoint (IPAddress.Parse ("127.0.0.1"), 8888);
        serverSocket.Bind (ipEndPoint);
        serverSocket.Listen (10);
        Console.WriteLine ("等待客户端连接...");

        while (true) {
            // 接受客户端连接请求
            Socket clientSocket = serverSocket.Accept ();
            Console.WriteLine ("客户端已连接");

            // 接收消息
            byte[] buffer = new byte[1024];
            int count = clientSocket.Receive (buffer);
            string message = Encoding.UTF8.GetString (buffer, 0, count);
            Console.WriteLine ("客户端：" + message);

            // 发送消息
            string response = "已收到消息：" + message;
            clientSocket.Send (Encoding.UTF8.GetBytes (response));
            Console.WriteLine ("已发送消息：" + response);

            // 关闭客户端 Socket
            clientSocket.Shutdown (SocketShutdown.Both);
            clientSocket.Close ();
            Console.WriteLine ("客户端已关闭连接");
        }
    }
}

客户端代码：

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

public class Client {
    public static void Main () {
        // 建立客户端 Socket，连接到指定 IP 地址和端口号
        Socket clientSocket = new Socket (AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        IPEndPoint ipEndPoint = new IPEndPoint (IPAddress.Parse ("127.0.0.1"), 8888);
        clientSocket.Connect (ipEndPoint);

        // 发送消息
        string message = "Hello, Server!";
        clientSocket.Send (Encoding.UTF8.GetBytes (message));
        Console.WriteLine ("已发送消息：" + message);

        // 接收消息
        byte[] buffer = new byte[1024];
        int count = clientSocket.Receive (buffer);
        string response = Encoding.UTF8.GetString (buffer, 0, count);
        Console.WriteLine ("服务端：" + response);

        // 关闭客户端 Socket
        clientSocket.Shutdown (SocketShutdown.Both);
        clientSocket.Close ();
        Console.WriteLine ("已关闭连接");
    }
}

以上是一个基于 Socket 的简易聊天项目的示例代码，可以在本地环境中进行测试。当客户端连接到服务端后，客户端向服务端发送一条消息，服务端接收到消息后向客户端回复一条消息。如果您有任何其他的问题，欢迎随时向我提问。