Canceling with CancellationToken

What you learn in this lesson

• explain how canceling works in .NET: CancellationTokenSource gives the signal, CancellationToken carries it on
• pass a CancellationToken through asynchronous methods and cancel a request with it
• give a request a time limit with CancellationTokenSource, also through a TimeProvider
• tell a timeout apart from a cancellation by the caller
• catch Ctrl+C and end the program cleanly
• query the Kladde’s holidays with a time limit, so the Kladde keeps working without a network