How To Cancel async Methods

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How do you cancel a long-running asynchronous method?
If that method runs many smaller steps, you may have a chance.
Supply it with a cancellation token.
Check the token occasionally and break preemptively.
Alternatively, consider throwing the OperationCanceledException here.
This is the typical implementation of a cancellable asynchronous method.
If you plan to call it, you can still await it, though that would block the caller.
If the caller wishes to cancel the task, then it must start from the CancellationTokenSource.
Pass the token from the source to the async method.
The caller should not await the async method then, but take it as a running task.
It would mind its own business until the time comes to cancel the async method.
Signal cancellation to the source and await the task now.
Learn more from my long video on task cancellation.

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Hi, I’m Zoran, I have more than 20 years of experience as a software developer, architect, team lead, and more. I have been programming in C# since its inception in the early 2000s. Since 2017 I have started publishing professional video courses at Pluralsight and Udemy and by this point, there are over 100 hours of the highest-quality videos you can watch on those platforms. On my YouTube channel, you can find shorter video forms focused on clarifying practical issues in coding, design, and architecture of .NET applications.❤️
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#dotnet #csharp #asyncawait

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