how to get MAC address of network adapter if some virtual adapter on the machine have operation status is Up.

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C#

ASP.NET

private string GetMACAddress() //----------------------retrive client MAC address
{
NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
String sMacAddress = string.Empty;
foreach (NetworkInterface adapter in nics)
{

if (adapter.OperationalStatus==OperationalStatus.Up)
{
sMacAddress = adapter.GetPhysicalAddress().ToString();
break;
}
}
return sMacAddress;
}