System.Net.NetworkInformation.Tests.NetworkInterfaceBasicTest.BasicTest_StaticLoopbackIndex_MatchesLoopbackNetworkInterface C# (CSharp) Method

        public void BasicTest_StaticLoopbackIndex_MatchesLoopbackNetworkInterface()
        {
            Assert.True(Capability.IPv4Support());

            _log.WriteLine("Loopback IPv4 index: " + NetworkInterface.LoopbackInterfaceIndex);

            foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
            {
                foreach (UnicastIPAddressInformation unicast in nic.GetIPProperties().UnicastAddresses)
                {
                    if (unicast.Address.Equals(IPAddress.Loopback))
                    {
                        Assert.Equal<int>(nic.GetIPProperties().GetIPv4Properties().Index,
                            NetworkInterface.LoopbackInterfaceIndex);
                        return; // Only check IPv4 loopback
                    }
                }
            }
        }