How to access an SNMP switch trap from VisualStudio? (C#)

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C#

Working on this code to find the value of the interface-down trap but can't seem to get it to work. Here code which provides numerous errors.

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

Thank you so much in advance!