識別活動網卡並獲取默認網關

Question

如何獲取活動網卡的識別並獲取默認網關？

Answer 1

下面的代碼給你的第一個默認網關：

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

return address.Address;