检查网络是否可以连接互联网

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

namespace SmsSoft
{
public class CheckInternetConnection
{
/// <summary>
/// 用于检查网络是否可以连接互联网,true表示连接成功,false表示连接失败
/// </summary>
/// <returns></returns>
[DllImport("wininet.dll")]
private extern static bool InternetGetConnectedState(int Description, int ReservedValue);
public static bool CheckConnection()
{
int Description = 0;
return InternetGetConnectedState(Description, 0);
}

}
}

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原文链接：
http://blog.csdn.net/vince6799/article/details/5876051