Enables Mono compiler to use C# 6 in Unity 5.5+ (also supports Visual Studio 2015+ Tools for Unity).
Add Assets/mcs.rsp to your Assets folder.
If you want to use VSTU, also add Assets/Editor folder. After deleting all *.csproj files, run Assets > Open C# Project.
- Unity 5.5 does not support .NET Framework 4.5 but 3.5. Features which require .NET Framework 4.0+ cannot be used as they are (
async,await,dynamic, and so on).
Toru Higuruma (@neofuji)