Obfuscation of .NET exe/dll [duplicate]

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.NET obfuscation of a DLL: how can I protect my code?

Hi all,

I'm using .net framework 4.0 and making any program. When i finished it, i publish it and get my programs exe. But any 3rd party softwares decompiles my exe and anybody views my codes. For example :

How do i save my code?

Thanks all...

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You could use an obfuscation tool, like Dotfuscator or Eazfuscator.NET.

Eazfuscator.NET is free, Dotfuscator has a limited Community Edition, but is lacking many of the features available for free in the other product.

UPDATE

Eazfuscator.NET is now commercial. This link provides a download link for the last free version and lists some alternatives (as of September 2012)