Consider adding a general capability, independent of current invocation concepts, to align shutdown handling with standard cancellation APIs. (For example, should `CancellationToken` support be available in `async Main`?)

[jonsequitur]

[KalleOlaviNiemitalo]

What was decided about the question in the title of this issue:

should CancellationToken support be available in async Main?

[jonsequitur]

Apologies for the absence of a description on this issue. I think the issue might be outside the scope of System.CommandLine but the concept of adding CancellationToken support to Main might be worth a new issue in dotnet/runtime.

@adamsitnik Thoughts on this?

[tmds]

I always liked the idea of having a CancellationToken for Main. It was something that also came up when we were discussing the PosixSignal API. See dotnet/runtime#50527 (comment) and following comments.

You can implement it yourself using the PosixSignal API.

cc @davidfowl