By design .NET embeds rich Meta data inside the executable code using MSIL. Any one can easilydecompile your DLL back using tools like ILDASM (owned by Microsoft) or Reflector for.NET which is a third party. Secondly there are many third party tools which make this decompilingprocess a click away. So any one can easily look in to your assemblies and reverse engineer themback in to actual source code and understand some real good logic which can make it easy tocrack your application.
The process by which you can stop this reverse engineering is using “obfuscation”. It’s a techniquewhich will foil the decompilers. There are many third parties (XenoCode, Demeanor for .NET)which provide .NET obfuscation solution. Microsoft includes one that is Dotfuscator CommunityEdition with Visual Studio.NET
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