How can I create snmp trap handlers using c# for receiving info from the UPS which is connected directly to the LAN network with its own IP address?
Thanks.
You may start from SNMP protocol to create your own, or utilize existing libraries. I have an evaluation report dating back from 2008,
https://docs.lextudio.com/blog/product-review-snmp-libraries-for-net-evaluation-report-e13f25991cad
To be biased, I recommend my own open source project #SNMP, where you can find how to capture traps (snmptrapd.exe sample in source code package), and then you can easily handle them.