UE4 does not use C# inside it self, only for build tools but for that you need .NET or Mono (if you not using Windows) and Java code is involved in Android. So to develop in UE4 overall you need .NET or Mono
UE4 does not use C# inside it self, only for build tools but for that you need .NET or Mono (if you not using Windows) and Java code is involved in Android. So to develop in UE4 overall you need .NET or Mono