识别活动网卡并获取默认网关

Question

如何获取活动网卡的标识并获取默认网关？

Answer 1

以下代码为您提供了第一个默认网关：

 NetworkInterface card = NetworkInterface.GetAllNetworkInterfaces().FirstOrDefault();
 if (card == null)
    return null;
 GatewayIPAddressInformation address = card.GetIPProperties().GatewayAddresses.FirstOrDefault();
 if (address == null)
     return null;

 return address.Address;