Windows tool to write socket output to file

Does anyone know of a Windows tool that will write the o开发者_C百科utput from a network socket to a file?

Open Source (preferably C#) would be preferred, but not essential.

I know it would probably be pretty simple to write one, but I am guessing that an existing tool would probably have features that I haven't even realised I want yet.

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Netcat should do what you want on Windows. (Not C#, admittedly.)