Benchmark for a .NET WinPcap wrapper

Question

I'm developing a .NET wrapper for WinPcap called Pcap.Net.

I'm trying to make sure this wrapper has high performance and I want to compare it to WinPcap and to other .net wrappers for WinPcap.

The features I want to profile are:

1. WinPcap native features (sending packets in different ways, receiving packets in different ways...)
2. Interpreting packets that Pcap.Net knows how to interpret (like Etherent, IPv4, UDP, TCP, ICMP, ...)
3. Building packet that Pcap.Net knows how to build (the same types it knows how to interpret).

I also want to be able to profile the benchmark using Visual Studio 2010 Ultimate profiling tools.

My question is: What should my benchmark exactly do to cover these issues and how would you suggest to build it?