How to uniquely identify computer using C#?

Question

How to uniquely identify computer (mainboard) using C#(.Net/Mono, local application)?

Edition. We can identify mainboard in .Net using something like this (see Get Unique System Identifiers in C#):

using System.Management;
...
ManagementObjectSearcher searcher = new ManagementObjectSearcher("select * from Win32_MotherboardDevice");
...

But unfortunately Mono does not support System.Management. How to do it under Mono for Linux? - I don't know :(