I am trying to create C# library, but when I import the library to another visual studio project I can see the dll source code. I know that you can decompile DLL with some reverse engineering methods, but I hope that visual studio would not show the library source code in reference manager.
Am I doing something wrong in building process of my library?
Thank you for your help.
What you are looking for is an obfuscator. It's not a bullet-proof strategy but it will take the complexity of decompiling your code to the next level. Also keep in mind that unless you have debug symbols removed, when you use the library on your local machine it will basically just refer back to your source code directly.
Here is a short list of the many obfuscation tools that are out there:
https://gapotchenko.com/eazfuscator.net
https://orangeheap.blogspot.nl
https://github.com/XenocodeRCE/neo-ConfuserEx
And a widely used commercial product:
