【转】C#检测是否联网

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace LocalApp.ConsoleApp.Core
{
public class Net
{
[DllImport("wininet")]
private extern static bool InternetGetConnectedState(out int connectionDescription, int reservedValue);

/// <summary>
/// 检测本机是否联网
/// </summary>
/// <returns></returns>
public static bool IsConnectedInternet()
{
int i = 0;
if (InternetGetConnectedState(out i, 0))
{
//已联网
return true;
}
else
{
//未联网
return false;
}

}

}
}