How do I get the Mac Address for and Android Device using 6.0 or higher in c#?

Question

I have found a few examples using Java, however I am having trouble constructing the method to c#. Can anyone please post a straightforward c# example that gets the Mac Address of my device, FOR Marshmallow (6.0). I understand that there are other methods of obtaining a unique Id, I am not really interested in having to import components at this time. I am using Xamarin with Visual Studio 2015.

I have these permissions active:

ACCESS_WIFI_STATE INTERNET READ_PHONE_STATE

The only codes I have tried are the simple methods used for below android version 6.0. Any help is appreciated.

EDIT: I do not believe this to be a duplicate as I requested for a c# version of the code specifically

Answer 1

Unfortunately, you're out of luck. Starting from version 6.0, Android restricts the access to the MAC address. If you try to query the MAC address of your current device, you'll get a constant value of 02:00:00:00:00:00

You can still access MAC addresses of the nearby devices, as is stated in the official Android documentation:

To access the hardware identifiers of nearby external devices via Bluetooth and Wi-Fi scans, your app must now have the ACCESS_FINE_LOCATION or ACCESS_COARSE_LOCATION permissions:

Edit: While the official way of getting the MAC address is not supported, it sure seems to be possible by taking a little detour. I post here a minimal example that just goes through all network interfaces and outputs the MAC addresses to the console if there's one:

// NetworkInterface is from Java.Net namespace, not System.Net
var all = Collections.List(NetworkInterface.NetworkInterfaces);

foreach (var interface in all)
{
    var macBytes = (interface as NetworkInterface).GetHardwareAddress();

    if (macBytes == null) continue;

    var sb = new StringBuilder();
    foreach (var b in macBytes)
    {
        sb.Append((b & 0xFF).ToString("X2") + ":");
    }

    Console.WriteLine(sb.ToString().Remove(sb.Length - 1));
}

To use this in a real world scenario requires some null reference checking and other modifications, but it works.