This is an edit of the official Mono.CSharp codebase with edits for Unity modding:

• Backport C# 7 compiler code to .NET 3.5 (taken from https://github.com/kkdevs/mcs)
• Remove dependency on System.XML as some games don't ship with it
• Force Evaluator to import all memebers for code completion
• Ignore access checks during compilation (by overwriting MemberSpec.IsAccessible)
• Force the JIT to ignore access checks by marking the generated assembly as corlib_internal