C# - Mac-Adressen ermitteln

using System.Net.NetworkInformation;
...
private List<string> GetMac()
{
            NetworkInterface[] NetworkAdapters = NetworkInterface.GetAllNetworkInterfaces();
            List<string> MyAdapter = new List<string>();

            foreach (NetworkInterface adapter in NetworkAdapters)
            {
              MyAdapter.Add("Adapter: "+ adapter.Description+" / MAC: " + adapter.GetPhysicalAddress().ToString());
            }

            return MyAdapter;
}