Cancellation and Progress
Because the Async pattern relies on the Task class, implementing cancellation is something similar to what you have already studied back in Chapter 41, thus the CancellationTokenSource and CancellationToken classes are used. In this section you see how to implement cancellation both for asynchronous methods and for Task.Run operations. Next, you learn how to report the progress of an operation, which is common in asynchronous programming and improves the user experience.
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