change to ResetValidationTokenSource to guard against a disposed validationTokenSource

[matt-bartholomew]

…

Description of Change

Reset validation token source may be called on a disposed validationTokenSource, resulting in an objectdisposedexception.

Linked Issues

• Fixes [BUG] Cancel being called on a disposed CancellationTokenSource #2310

PR Checklist

• Has a linked Issue, and the Issue has been approved(bug) or Championed (feature/proposal)
• Has tests (if omitted, state reason in description)
• Has samples (if omitted, state reason in description)
• Rebased on top of main at time of PR
• Changes adhere to coding standard
• Documentation created or updated: https://github.com/MicrosoftDocs/CommunityToolkit/pulls

Additional information

Unsure how to add tests - never done testing before.
I think "Has samples" is good/checked, as the issue has a sample it can be tested against.
Honestly I dont understand the comment behind documentation created or updated.

[TheCodeTraveler]

Thanks @matt-bartholomew!

[matt-bartholomew]

@dotnet-policy-service agree company="BizSpeed Inc"

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[matt-bartholomew]

@brminnick Going to be honest - this is my first time contributing to opensource stuff and to the communitytoolkit. What's the timeline between this change getting approved, merged, and then actually published in an updated package? I don't know if that information is public anywhere, I just can't find it.

[matt-bartholomew]

@brminnick Currently failing 3/6 statuses/checks. Not sure that these failures are anything within my control/due to my changes. Can you have a look and just let me know? Thanks!

[bijington]

Thank you for the submission.

The pipeline errors don't appear to be caused by your changes. Well sort those at some point. We've been trying to ship .NET 9.0 support so a release will likely fall on when that gets completed.

We don't have strict timelines for this stuff. Just as and when there is enough to ship

[pictos]

@matt-bartholomew can you take at your end and see if the project builds?

[matt-bartholomew]

@matt-bartholomew can you take at your end and see if the project builds?

@pictos I built and tested on my end on windows using the sample app from the linked issue. I had no issue running or anything like that.

[pictos]

@matt-bartholomew are you on .net 8 or 9? Just to confirm if the issue is on our pipeline

[matt-bartholomew]

@matt-bartholomew are you on .net 8 or 9? Just to confirm if the issue is on our pipeline

@pictos 8.

[matt-bartholomew]

@pictos @brminnick @bijington I don't think some of these pipeline failures are due to anything I introduced. Can one of you look and let me know? When would I be able to see this in a release?

[pictos]

@matt-bartholomew no worries about it. PRs will not be merged until we figure out .NET 9 support

[bijington]

And we should be very close now!

[Copilot]

Copilot reviewed 1 out of 1 changed files in this pull request and generated no suggestions.

[TheCodeTraveler]

Thanks @matt-bartholomew!

Request implemented