Question

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Reliable method to get machine's MAC address in C#

I want to obtain the mac address of the system through code in the application program so i can use it to authorize at the system level ?

Answer 1

You can get it via the active network interface, such as:

var mac =
    (from item in NetworkInterface.GetAllInterfaces()
    where item.OperationalStatus == OperationalStatus.Up
    select item.GetPhysicalAddress()).FirstOrDefault();

Failing retrieval from an active interface, you might consider just grabbing the loopback address. Also, you could loop the elements as opposed to using Linq, should you wish to.