C# 7 and .NET Core 2.0 High Performance

Task cancellation

Cancellation is an optional thing for TAP-based asynchronous methods. If the method accepts the CancellationToken as the parameter, it can be used by the caller party to cancel a task. However, for a TAP, the cancellation should be properly handled. Here is a basic example showing how cancellation can be implemented:

static void Main(string[] args) { CancellationTokenSource tokenSource = new CancellationTokenSource(); CancellationToken token = tokenSource.Token; Task.Factory.StartNew(() => SaveFileAsync(path, bytes, token)); } static Task<int> SaveFileAsync(string path, byte[] fileBytes, CancellationToken cancellationToken) { if (cancellationToken.IsCancellationRequested) { Console.WriteLine("Cancellation is requested..."); ...