Returns objects that describe the network interfaces on the device.

NetworkInfo.cs

using System;
using System.Net.NetworkInformation;

namespace BoynerTest
{
    /// <summary>
    /// Cross-platform API for network information.
    /// </summary>
    public static class NetworkInfo
    {
        /// <summary>
        /// Get all network interfaces on the device. Network interfaces provide network connectivity, they are also known as network adapters.
        /// </summary>
        /// <returns>
        /// A NetworkInterface array that contains objects that describe the available network interfaces, or an empty array if no interfaces are detected.
        /// </returns>
        public static NetworkInterface[] GetInterfaces()
        {
            return NetworkInterface.GetAllNetworkInterfaces();
        }

        public static string GetMacAddress()
        {
            var interfaces = GetInterfaces();

            foreach (var netInterface in interfaces)
            {
                if (netInterface.NetworkInterfaceType == NetworkInterfaceType.Wireless80211 ||
                    netInterface.NetworkInterfaceType == NetworkInterfaceType.Ethernet)
                {
                    var address = netInterface.GetPhysicalAddress();
                    return BitConverter.ToString(address.GetAddressBytes());

                }
            }

            return "NoMac";
        }
    }
}