Version: 2018.4
Writing and executing tests in Unity Test Runner
IL2CPP

C# compiler

To compile C# source code in a Unity Project, the Unity Editor uses a C# compiler. The C# compiler that Unity uses depends on the Scripting Runtime Version option in the Player Settings (menu: Edit > Project Settings > Player > Other Settings).

Scripting Runtime Version C# compiler C# language version
.NET 3.5 equivalent mcs C# 4
.NET 4.6 equivalent Roslyn C# 7.3

The Editor passes a default set of options to the C# compiler. To pass additional options in your project, see the documentation for Platform Dependent Compilation.


C# compiler Roslyn compiler NewIn20183

Writing and executing tests in Unity Test Runner
IL2CPP