N. Taylor Mullen e2d476cc6f Associate C# version with each Razor extension version. ... - Roslyn now default to 8.0 C# so it's no longer specified in a users project file. Because of this restriction we can no longer see the projects `LangVersion` when generating Razor files. Meaning, we can't conditionally generate C# 8.0 aware code because our Razor default is not C# 8.0. Therefore, when we detect that the C# lang version hasn't been provided we don't set a C# version and instead rely on what the default configuration for the Razor project is. In practice this looks like: - MVC1.X = C# 7.3 - MVC2.X = C# 7.3 - MVC Latest = C# 8.0 - I thought about adding a feature flags variant for `RazorCodeGenerationOptions` but decided not to since C# features are all configurable options that are based on more than just the `RazorLangVersion`. - Added integration tests to ensure that command line builds with implicit `LangVersion`s result in proper C# nullability handling. aspnet/AspNetCoredotnet/aspnetcore-tooling#12594 \n\nCommit migrated from f039aa9354		2019-08-02 17:14:10 -07:00
src	Associate C# version with each Razor extension version.	2019-08-02 17:14:10 -07:00