c#判断是否有网络

?

1 2 3 4 5 6 7 8 9 10 11 12 13

//调用操作系统API  [System.Runtime.InteropServices.DllImport("wininet")] private extern static bool InternetGetConnectedState(out int connectionDescription, int reservedValue);           /// <summary>         /// 判断是否链接到外网         /// </summary>         public static bool IsNetWorkConnect()         {             int i = 0;             return InternetGetConnectedState(out i, 0) ? true : false;         }