What to use for port forwarding in p2p application in C#: NAT-PMP or UPnP IGD?

Question

.NET

There is a p2p chat created in c#. Which of the port forwarding methods will be easier to implement, is supported by a large number of network devices, etc. ?
I believed this article that NATUPnPLib should not be used, since the library is rather unreliable.

Answer 1

Usually both methods are used at once, if possible.

Answer 2

use https://github.com/alanmcgovern/Mono.Nat or its fork https://github.com/lontivero/Open.NAT
As an option, libnatpmp sish lib
NAT-PMP is better if possible, but if not, then try to hammer through UPnP IDG