Unobserved task exception bugfix#254
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This PR fixes issue #253
When calling
SqlTableDependency<T>.Stop()method anUnobservedTaskExceptionevent is raised, which is not supposed to happen as an application withThrowUnobservedTaskExceptionsset totruewould crash when this happens.This PR removes the redundant call to
.WithException(cancellationToken)inside theSqlTableDependency<T>.WaitForNotificationsmethod. It is not needed because thecancellationTokenis already passed to thesqlCommand.ExecuteReaderAsyncmethod. When.WithException(cancellationToken)is called and theStop()method requests a cancellation then the internal task returned from thesqlCommand.ExecuteReaderAsyncis not awaited at all (because the internal task created within.WithException(cancellationToken)executes (fails due to cancellation) first.A test case is also included.