Hello
you can get all network from this code
you can find your dongle and get you mac address
foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
{
string tempMac = nic.GetPhysicalAddress().ToString();
if (nic.Speed > maxSpeed &&
!string.IsNullOrEmpty(tempMac) &&
tempMac.Length >= MIN_MAC_ADDR_LENGTH)
{
maxSpeed = nic.Speed;
macAddress = tempMac;
}
}