[Enhancement] .NET Interactive and .NET Versions

[seesharprun]

I'm a big fan of .NET Interactive and have already started using the C# kernel in Visual Studio Code Notebooks and Try .NET for classroom/training scenarios.

With that being said, it took some trial and error for me to figure out that .NET Interactive did not support the C# 9 language features available in the latest .NET 5 preview 7. C# is evolving faster than ever and I, as a instructor and author, want to be able to use .NET Interactive long-term as a way to teach students the new language features as they land.

So my questions are:

• How do we track which version of C# (or .NET) is supported in .NET Interactive? It's implied that C# 8 is supported because of the .NET Core 3.1 pre-req, but this should be clearly stated somewhere. Maybe I missed it.
• Long-term, what type of latency should we expect between new versions of .NET/C# and .NET Interactive. In the training space, I want to start planning for courseware using C# 9 and .NET 5. If, for example, support will be available 6 months after GA, then that would help immensely with planning.

Thanks!

[MineCake147E]

I just ran into the same problem. I tried running a C# notebook with features that are added in .NET 8 Preview.

[jonsequitur]

The C# version you'll see in .NET Interactive is the latest non-preview version.

We're planning to make this more flexible after the .NET 8 release, in order to support preview versions as well as previous versions.