.NET framework : Are all System.* dlls not intellectual property?

Question

All .NET dlls can be reverse engineered easily, hence .NET can be considered as an intellectual property as opposed to C++. Recently I found that using some tool, all System.* dlls used in .NET project can also be peeped into. Question here is why System.* dlls in .NET are not obfuscated? What security is provided in .NET framework to make it more like intellectual property?

Answer 1

There is no safety in obfuscating something that is open source and the code itself is publicly available online.

.NET Core is an open source project (https://github.com/Microsoft/dotnet) The implementation for the individual classes that make up the full .NET Framework are also available at https://referencesource.microsoft.com/.