How can I get a CultureInfo or RegionInfo from United Nations M49 Country code in C#?

Question

I want to create the ISO code from the UN M49 code which I receive from database. How can I do that in c#?

ex: Sweden's UN M49 code is 752. How can I convert it to something like Sweden or Iso code "sv"

I try to create CultureInfo and RegionInfo from that code but C# doesn't regconize it.