Nope, UE4 uses AActor and components within it. Just use instead of asking of convert Unreal into Unity 
There’s zero need for C# while Unreal C++ makes its job.
As pointed above, Epic might work on the custom scripting language. Designed to fill gaps between Unreal C++ and blueprints. And tailored to video game development needs. Not like Unity’s environment - it took over a decade there to make launching a game in editor fast! C# is far from ideal for programming games.
It’s exactly like Henry Ford said: "“If I had asked people what they wanted, they would have said faster horses.” You don’t C# here, we don’t need to make programming and learning more difficult by adding another general-purpose language to the engine. The entire engine, plugins and everything is written using C++, you still would need to learn it in order to read engine’s code, debug it, copy-paste some tool code to make your own tools.
Just grab Resharper++ extension to Visual Studio and code like a boss. For me Unreal C++ it’s more like a decent scripting language already. It’s closer to Unity’s C# than pure C++ which you never gonna touch for gameplay scripting in UE4 