Wow..Cisco Netflow. What a pain in the a$$. Anyways, I think I am going
to have the only .NET Netflow Capture and Parsing program in the
world. Hopefully. It really is tough to parse the packets and decode
the correctly, but I am on the right track. Ethereal helped me a bit in
that department. Ethereal has a built in netflow decoder (CFLOW) which allowed me to view the packet part by part, to they byte level and then see how the packets are set up.

Cisco Netflow

Ethereal