How to find OID of "interface-down" trap on MLNX-OS Switch? Trying to GET value from C#

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C#

networking

event

SNMP

I am attempting to implement this code to find out the state of my MLNX ethernet switch and eventually map my port data.

This at the moment is retrieving numerous errors, and I believe the issue is down to an invalid OID for my switch.

public void getValue(){


IPEndPoint ip = new IPEndPoint(IPAddress.Parse("192.163.77.11"), 161);
OctetString oc = new OctetString("public");
List<variable> a = new List<variable> { new Variable(new ObjectIdentifier("1.3.6.1.2.1.2.2.1.8")) };
var result = Messenger.Get(VersionCode.V1, ip, oc, a, 60000);

}

----code was taken from http://www.codeproject.com/Articles/468892/An-introduction-to-sharpSNMP-an-Open-Source-SNMP---

Your help would be very much appreciated. I am really struggling at the moment with my switch and really any help would go a long way.