1)   Adventnet SNMP API .NET 4
AdventNet SNMP API .NET Edition is a comprehensive development toolkit for SNMP-based network management applications. AdventNet's SNMP stack comprises set of powerful .NET SNMP library to build real-time applications for monitoring/tracking networks
.NET SNMP, SNMP, Network Management, SNMP Trap, SNMP V1, SNMP V2Ct, SNMP API, SNMP monitoring, SNMP request, SNMP response,