I need testing tips

I'm making a C# application in VS2010 that can act as both a client and a server (To communicate with other instances of itself).

My question is, what is a good way of testing the networking in such an application?

I can publish and run the application on another machine but I'd like开发者_Python百科 to be able to debug both instances.

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Testing Techniques

Using Packet sniffers, such as Wireshark, to monitor and analysis packets, such as their source and destination IP addresses, MAC addresses, port numbers, protocols, etc... For a *Nix environment there's TCPdump.

A basic guide to using Wireshark

I would also recommended reading Richard Blum C# Network Programming Book. There's an Ebook copy available. Contains useful information about testing network communications...