I need to include some Dynamic Libraries in my project, including the .net framework libraries, but I have not found anyway to link it. I tried to active the clr (Common Language Runtime) to use the namespaces: System and System.IO, and I used the sentence “using namespace System” but It is not recognized for the project.
If somebody have found anyway to link external libraries besides the Unreal documentation way, I will thank this help 
What you need .net in first place? You should use UE4 APIs foremost, don’t let your Unity addiction get you 
I’m reasonably sure you “can’t” directly call C# / CLR from C++ … but I work with compilers more than Unreal so I could be wrong
… you can probably embed the DotNet VM in an Unreal project (like any other C++ project)
Xamian started doing this https://mono-ue.github.io/ but gave up in 2014
I need to use clr to add directly some dll to my Unreal project