ProgrammerGuide.Net | Step by Step Programmer Guide

.Net Interview Question: How to prevent my .NET DLL to be decompiled? | Programming Tutorial | Step by Step Programmer Guide

By design, .NET embeds rich Meta data inside the executable code using MSIL. Any one can easily decompile 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 decompiling process a click away. So any one can easily look in to your assemblies and reverse engineer them back in to actual source code and understand some real good logic, which can make it easy to crack your application.

The process by which you can stop this reverse engineering is using “obfuscation”. It is a technique, which will foil the decompilers. Many third parties (XenoCode, Demeanor for .NET) provide .NET obfuscation solution. Microsoft includes one that is Dotfuscator Community Edition with Visual Studio.NET.

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