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;

}

}

}

}