如何从c#建立连接

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

class Program
{
    static void Main()
    {
        // 服务器IP地址和端口号
        string serverIP = "服务器IP地址";
        int serverPort = 1234;

        // 创建一个Socket对象
        Socket clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

        try
        {
            // 连接到服务器
            clientSocket.Connect(serverIP, serverPort);

            // 连接成功后可以进行数据的发送和接收操作

            // 关闭连接
            clientSocket.Close();
        }
        catch (Exception ex)
        {
            Console.WriteLine("连接失败: " + ex.Message);
        }
    }
}

using System;
using System.Net.Http;

class Program
{
    static void Main()
    {
        // 服务器URL
        string serverUrl = "服务器URL";

        // 创建一个HttpClient对象
        HttpClient httpClient = new HttpClient();

        try
        {
            // 发送GET请求并获取响应
            HttpResponseMessage response = httpClient.GetAsync(serverUrl).Result;

            // 处理响应数据

            // 关闭连接
            httpClient.Dispose();
        }
        catch (Exception ex)
        {
            Console.WriteLine("连接失败: " + ex.Message);
        }
    }
}