ClientTest：

using System;
using System.Net.Sockets;
using System.Text;class TcpClientTest
{static void Main(string[] args){try{// 创建一个TcpClient实例并连接到服务器  TcpClient client = new TcpClient("1vg5062570.51mypc.cn", 43319);//1vg5062570.51mypc.cn:43319// 获取一个NetworkStream对象以进行读写  NetworkStream stream = client.GetStream();// 将消息转换为字节数组  string message = "Hello from the client!";byte[] data = Encoding.ASCII.GetBytes(message);// 发送消息到服务器  stream.Write(data, 0, data.Length);// 读取服务器的响应  byte[] buffer = new byte[4096];int bytesRead = stream.Read(buffer, 0, buffer.Length);// 将接收到的字节转换为字符串  string responseData = Encoding.ASCII.GetString(buffer, 0, bytesRead);Console.WriteLine("Received from server: " + responseData);// 关闭连接  client.Close();}catch (Exception e){Console.WriteLine("Error: " + e.Message);}// 等待用户按键，以便在控制台中查看结果  Console.WriteLine("Press Enter to continue...");Console.ReadLine();}
}

ClientTestV3：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft.Json;
using System.IO;public class IPport
{public string IP { get; set; }public int Port { get; set; }
}namespace ClientTestV3
{internal class Program{static void Main(string[] args){try{string jsonFilePath = "ipport.json"; // 替换为你的JSON文件路径  // 读取文件内容  string jsonContent = File.ReadAllText(jsonFilePath);// 反序列化JSON字符串到对象  IPport ipaddr = JsonConvert.DeserializeObject<IPport>(jsonContent);// 输出结果  Console.WriteLine($"{ipaddr.IP}:{ipaddr.Port}");// 创建一个TcpClient实例并连接到服务器  TcpClient client = new TcpClient($"{ipaddr.IP}", ipaddr.Port);// 获取一个NetworkStream对象以进行读写  NetworkStream stream = client.GetStream();// 将消息转换为字节数组  string message = "Hello from the client!";Random rand = new Random();message += rand.Next().ToString();byte[] data = Encoding.ASCII.GetBytes(message);// 发送消息到服务器  stream.Write(data, 0, data.Length);// 读取服务器的响应  byte[] buffer = new byte[4096];int bytesRead = stream.Read(buffer, 0, buffer.Length);// 将接收到的字节转换为字符串  string responseData = Encoding.ASCII.GetString(buffer, 0, bytesRead);Console.WriteLine("Received from server: " + responseData);Console.WriteLine("ReceivedBytes:{0}", bytesRead);// 关闭连接  client.Close();}catch (Exception e){Console.WriteLine("Error: " + e.Message);}// 等待用户按键，以便在控制台中查看结果  Console.WriteLine("Press Enter to continue...");Console.ReadLine();}}
}