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by Jiří {x2} Činčura

Cancel CancellationTokenSource after a timeout

24 Jan 2013 1 mins Multithreading/Parallelism/Asynchronous/Concurrency

Maybe you already discovered it. But in .NET 4.5 the CancellationTokenSource class has a new method CancelAfter. It allows you to signal cancellation after a specified interval aka timeout.

In .NET 4 you’d have to Wait on a Task to complete or not and if not, do the cancellation. This might go little bit off control if you have a bunch of tasks. In .NET 4.5 a handy Task.Delay was added and with await/async it was easier. But still.

Setting a timeout and basically forgetting about it is a nice little help, that will make the code little more clean and easier to comprehend.

Profile Picture Jiří Činčura is an independent developer, .NET, C# and Firebird expert, focusing on data and business layers, language constructs, parallelism, databases and performance. He's Microsoft Most Valuable Professional and frequent speaker. You can read his articles, guides and tips and tricks at