Enable C#12

[colombod]

Complete .NET8 release with C#12 support

[johngardner58work]

using declaration not supported only using statements. Get Error: (4,22): error CS1002: ; expected
See code from Jupyter Lab in VScode .NET Interactive Kernel below:
`#r "nuget: Microsoft.Extensions.Logging, 8.0.0"
#r "nuget: Microsoft.Extensions.Logging.Console, 8.0.0"
#r "nuget: Microsoft.Extensions.Configuration, 8.0.0"

using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging.Console;

using ILoggerFactory factory = LoggerFactory.Create(builder => builder.AddConsole().SetMinimumLevel(LogLevel.Information));
ILogger logger = factory.CreateLogger("Program");

logger.LogTrace("Trace message");
logger.LogDebug("Debug message");
logger.LogInformation("Info message");
logger.LogWarning("Warning message");
logger.LogError("Error message");
logger.LogCritical("Critical message");`

[colombod]

Using statement are not supported in csharp scripting, they won't work

[jonsequitur]

@johngardner58work Is it your expectation that disposal would happen when the kernel is shut down (i.e. when you restart it or close the notebook)?

If so you can do this:

Microsoft.DotNet.Interactive.Kernel.Root.RegisterForDisposal(factory);

[johngardner58work]

@colombod Using statement in block form does work, not the using declaration form. I don't see why Csharp scripting would care which. Perhaps I should repost for Csharp scripting?

if (...) // this does not work
{
using FileStream f = new FileStream(@"C:\users\jaredpar\using.md");
// statements
}

// NOT Equivalent in C# script but DOES work
if (...)
{
using (FileStream f = new FileStream(@"C:\users\jaredpar\using.md"))
{
// statements
}
}

[jonsequitur]

Perhaps I should repost for Csharp scripting?

The place to open this issue would be in dotnet/roslyn.