C# 判断是否联网

C# 判断是否联网

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public static class Internet     {         [DllImport("winInet.dll")]         private static extern bool InternetGetConnectedState(ref int dwFlag, int dwReserved);                 /// <summary>         /// 返回网络状态         /// </summary>         public static bool Status         {             get             {                 Int32 dwFlag = new int();                 if (!InternetGetConnectedState(ref dwFlag, 0))                 {                     return false;                 }                 else                 {                     return true;                 }             }         }     }