Is Roslyn ready for C# 10?

Question

Here is my old code:

syntaxTrees.AddRange( filesToCompile.ConvertAll( filename => Parse( File.ReadAllText( filename ), filename, CSharpParseOptions.Default.WithLanguageVersion( LanguageVersion.CSharp9 ) ) ) );

The part that seems more relevant:

CSharpParseOptions.Default.WithLanguageVersion( LanguageVersion.CSharp9 )

It doesn't seem that the language version has a CSharp10 enum yet?

user_2996339 · Answer

You need to use Microsoft.CodeAnalysis.CSharp 4.0.0 onwards to use C# 10. The first non-preview version is 4.0.1.

dotnet add package Microsoft.CodeAnalysis.CSharp --version 4.0.1

Then you can use LanguageVersion.CSharp10

user_2501279 · Answer

LanguageVersion.CSharp10 was added in June and is available currently in Microsoft.CodeAnalysis.CSharp version 4.0.0 preview nuget builds, the latest being Version 4.0.0-6.final.

Is Roslyn ready for C# 10?

2 Answers