TCP Spy .NET is a small application used to trace TCP packets between a client and a server. Optimized for.Net Web Services or Web Site TCP Spy .NET will help you find any bottleneck and it will help you in analyzing your bandwidth usage. With TCP Spy .NET, you can inspect data in different views, track server calls or just redirect the host.

It's a 4 in 1 tool:

Monitoring Tool

Web Service / Web Site profiling Tool

Redirection Server

Network / Web Site / Web Services Spy

You can now get TCP Spy .NET Pro Edition for free!