C# 使用TcpClient 测试网络连接是否正常

using System.Net.Sockets;

TcpClient client = new TcpClient();
//参数1指定ip地址，参数2指定端口
var result = client.BeginConnect("127.0.0.1", 80, null, null);
//TimeSpan.FromSeconds(1) 表示测试连接1秒，即超时时间
var success = result.AsyncWaitHandle.WaitOne(TimeSpan.FromSeconds(1));
client.Close();
Console.WriteLine(success);