Executables of .NET (.NET Assemblies ) are easy to decompile. Several .NET decompilers are published which allows to upload Assemblies for decompilation.

Decompilation of Assemblies to human readable source-code is possible because of the containment of meta data in the Assemblies and because of the higher level of the compiled 'MSIL' code.

The LSW IL-Obfuscator ( LSW-ILOBF ) is a tool to make the Decompilation 'useless' because it destroys the Metadata information by replacing meaningful Names by meaningless ones.

It helps to protect the intellectual property of software-authors.