How to get default NIC Connection Name

Question

IMPORTANT EDIT: Back again on this subject. As you said there should be no default NIC, I\'m trying to understand if there is a way to detect all the NICs t

Answer 1

using System.Linq;
using System.Net.NetworkInformation;

var nic = NetworkInterface
     .GetAllNetworkInterfaces()
     .FirstOrDefault(i => i.NetworkInterfaceType != NetworkInterfaceType.Loopback && i.NetworkInterfaceType != NetworkInterfaceType.Tunnel);
var name = nic.Name;

or more elegant solution:

.Where(i => !(
    new[] { NetworkInterfaceType.Loopback, NetworkInterfaceType.Tunnel }
    .Contains(i.NetworkInterfaceType)))

or if you want to practice in LINQ:

static IEnumerable GetAllNetworkInterfaces(IEnumerable excludeTypes)
{
    var all = NetworkInterface.GetAllNetworkInterfaces();
    var exclude = all.Where(i => excludeTypes.Contains(i.NetworkInterfaceType));
    return all.Except(exclude);
}

Usage:

var nic = GetAllNetworkInterfaces(new[] { NetworkInterfaceType.Tunnel, NetworkInterfaceType.Loopback });