C# - implementing Task.Delay Not Resuming Correctly After Cancellation in Async Method
I'm working with a frustrating scenario with the handling of `Task.Delay` in an asynchronous method when cancellation is involved. I've implemented an async method that uses `CancellationToken` to allow the operation to be canceled. However, when I attempt to cancel the delay, it seems to continue running in the background, leading to unexpected behavior in my application. Here's a simplified version of my code: ```csharp public async Task PerformOperationAsync(CancellationToken cancellationToken) { try { Console.WriteLine("Operation started"); await Task.Delay(5000, cancellationToken); Console.WriteLine("Operation completed"); } catch (TaskCanceledException) { Console.WriteLine("Operation was canceled"); } } ``` In the calling method, I set up the cancellation token like this: ```csharp var cts = new CancellationTokenSource(); Task.Run(() => { Thread.Sleep(2000); // Simulate some delay before cancellation cts.Cancel(); }); await PerformOperationAsync(cts.Token); ``` I expect to see "Operation was canceled" after the `Task.Delay` is canceled, but instead, I sometimes see "Operation completed". This is inconsistent and seems related to timing or how the cancellation is implemented. I'm using .NET 5.0, and I'd like to make sure I'm following best practices. What am I missing here? Is there a better way to handle this scenario?