Hi somnathbanik,
Only applications that are declared as privileged in the device metadata of the PC container have access to this API. The list or privileged apps in the device metadata of the PC container is governed by an OEM.
So if you are an OEM and/or working on behalf of an OEM, you can use this API correctly, see this similar thread:
https://social.msdn.microsoft.com/Forums/vstudio/en-US/a93fdff5-2443-4ab9-abc7-40d0e1e234da/runtime-error-running-metro-store-app-with-smbiosinformationserialnumber?forum=tailoringappsfordevices
>>It will be ok if I can get the device MAC address also
Unfortunately, there is no such API to allow retrieving this information in WinRT
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