编辑“︁C Sharp 网络编程概述”︁（章节）

=== TCP示例：简易服务器与客户端 ===

以下是一个使用TCP协议的简易服务器和客户端实现：

<syntaxhighlight lang="csharp">
// 服务器端代码
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

class TCPServer
{
    static void Main()
    {
        TcpListener server = new TcpListener(IPAddress.Any, 8080);
        server.Start();
        Console.WriteLine("服务器已启动，等待连接...");

        TcpClient client = server.AcceptTcpClient();
        Console.WriteLine("客户端已连接");

        NetworkStream stream = client.GetStream();
        byte[] buffer = new byte[1024];
        int bytesRead = stream.Read(buffer, 0, buffer.Length);
        string message = Encoding.ASCII.GetString(buffer, 0, bytesRead);
        Console.WriteLine($"收到消息: {message}");

        string response = "消息已接收";
        byte[] data = Encoding.ASCII.GetBytes(response);
        stream.Write(data, 0, data.Length);

        client.Close();
        server.Stop();
    }
}
</syntaxhighlight>

<syntaxhighlight lang="csharp">
// 客户端代码
using System;
using System.Net.Sockets;
using System.Text;

class TCPClient
{
    static void Main()
    {
        TcpClient client = new TcpClient("127.0.0.1", 8080);
        Console.WriteLine("已连接到服务器");

        NetworkStream stream = client.GetStream();
        string message = "Hello, Server!";
        byte[] data = Encoding.ASCII.GetBytes(message);
        stream.Write(data, 0, data.Length);
        Console.WriteLine($"发送消息: {message}");

        byte[] buffer = new byte[1024];
        int bytesRead = stream.Read(buffer, 0, buffer.Length);
        string response = Encoding.ASCII.GetString(buffer, 0, bytesRead);
        Console.WriteLine($"服务器响应: {response}");

        client.Close();
    }
}
</syntaxhighlight>

'''输出示例：'''
<pre>
服务器输出：
服务器已启动，等待连接...
客户端已连接
收到消息: Hello, Server!

客户端输出：
已连接到服务器
发送消息: Hello, Server!
服务器响应: 消息已接收
</pre>