Using .NET 4.5 code in Unity 5

Question

I am working on a game using Unity3D version 5. The game should use strict business rules already programmed in a C# .NET4.5 engine. Using Xamarin/Mono, we hope to make this

Answer 1

Using a visual studio plugin: unmanaged exports, I have been able to export the C# .NET 4.5 to an unmanaged/native dll which I can use in Unity Engine. This forces to call only simple functions, but with little work, it was possible for me to wrap the core of my engine.

Answer 2

Short answer is no.

Unity has ".NET 2.0/3.5 era functionality," according to an official blog post.

According to the same post, a future version of Unity will be upgraded to "a modern version of .NET," with no timeline given for this major undertaking.

NOTE: This answer was written in response to the original version of the question, which was simply whether the .NET 4.5 library could be used directly in Unity.

Answer 3

Looks like Unity is upgrading to 4.6+ and is available in beta now

https://forum.unity3d.com/threads/upgraded-mono-net-in-editor-on-5-5-0b4.433541/