c# - Identification of active network card and get Default Gateway -

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this question has answer here:

how identification of active network card , default gateway?

http://s4.picofile.com/file/7871762682/default_gateway.png

the following code gives first default gateway:

 networkinterface card = networkinterface.getallnetworkinterfaces().firstordefault();  if (card == null)     return null;  gatewayipaddressinformation address = card.getipproperties().gatewayaddresses.firstordefault();  if (address == null)      return null;   return address.address;

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