Hi all,
I have a application that written with C#. I know that there are some tools to decompile DLL, EXE file. How to prevent decompiling for security. What's the way to protect source code in .NET.
Please help me. Thank you very much.

.NET FrameworkSDKdoesn't include obfuscator tool. There's a dotfuscator community editionshipped as part of Visual Studion (2003, 2005 and 2008), but it is most probably part only of commercialVisual Studioversions and not part of Express versions.

You can try to search ".NET obfuscator free" in your favourite search engine (http://search.live.com/results.aspx?q=.NET+obfuscator+free)

There are 2 interestinglists of obfuscators for .NET I know about:

• http://www.howtoselectguides.com/dotnet/obfuscators/... There's one obfuscator listed as freeware (Aspose.Obfuscator), others have prices listed.
• http://msdn.microsoft.com/en-us/vcsharp/aa336818.aspx... You have to do the research here to see if some of the obfuscators listedare freeware.

Thank you for your reply.
I have found some tools to protect source code, but we have to pay money for these tools.
Are there a way to protect source code by .NET code ?

.NET FrameworkSDKdoesn't include obfuscator tool. There's a dotfuscator community editionshipped as part of Visual Studion (2003, 2005 and 2008), but it is most probably part only of commercialVisual Studioversions and not part of Express versions.

You can try to search ".NET obfuscator free" in your favourite search engine (http://search.live.com/results.aspx?q=.NET+obfuscator+free)

There are 2 interestinglists of obfuscators for .NET I know about:

• http://www.howtoselectguides.com/dotnet/obfuscators/... There's one obfuscator listed as freeware (Aspose.Obfuscator), others have prices listed.
• http://msdn.microsoft.com/en-us/vcsharp/aa336818.aspx... You have to do the research here to see if some of the obfuscators listedare freeware.

Thank you for your reply

Why you want your code should n't be seen by some one?
does it contain some terrorist messages ;)