Async methods do not support cancellation

[michaelelleby]

https://github.com/microsoft/FeatureManagement-Dotnet/blob/main/src/Microsoft.FeatureManagement/IFeatureManager.cs does not support https://learn.microsoft.com/en-us/dotnet/csharp/asynchronous-programming/cancel-an-async-task-or-a-list-of-tasks as is best practices in asynchronous programming.

Furthermore the overload Task<bool> IsEnabledAsync<TContext>(string feature, TContext context); gladly accepts CancellationToken as the context parameter, further adding confusion.

[jimmyca15]

Hello @michaelelleby, IFeatureManager was released without a CancellationToken parameter, and updating it would have been a breaking change.

We added a new interface that supersedes IFeatureManager named IVariantFeatureManager. This has cancellation token support.