using System;
using System.Net.NetworkInformation;
 
class Program
{
    static void Main()
    {
        NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
        foreach (NetworkInterface adapter in nics)
        {
            if (adapter.OperationalStatus == OperationalStatus.Up)
            {
                Console.WriteLine("MAC 주소: " + adapter.GetPhysicalAddress());
                break;
            }
        }
    }
}

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