How to determine which network adapter is connected to the internet

Question

I\'m writing a program in C# that needs to monitor the amount of internet bandwidth currently in use so it can do a background upload when the internet usage is low. How ca

Answer 1

Examine the routing table and look for the interfaces that have a default route (a route to 0.0.0.0) - that's your interface(s) that are connected to the wider world (if any).