Visual Basic 2015 Unleashed

Canceling Tasks

In some situations you want to cancel task execution. To programmatically cancel a task, you need to enable tasks for cancellation, which requires some lines of code. You need an instance of the System.Threading.CancellationTokenSource class; this instance tells a System.Threading.CancellationToken that it should be canceled. The CancellationToken class provides notifications for cancellation. The following lines declare both objects:

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Dim tokenSource As New CancellationTokenSource()Dim token As CancellationToken = tokenSource.Token

Setting Time for Cancellation

The .NET Framework 4.6 enables you to create an instance of the Cancellation-TokenSource class and specify on such an instance how much time ...