try
{
    someTask.Wait();
    orSomeTask.Result;
    await someAsyncMethod();
}
catch (AggregateException ae)
    when (ae.Flatten().InnerExceptions.Any(ie => ie is OperationCanceledException))
{
    HandleCancellation(device);
}
catch(OperationCanceledException)
{
    HandleCancellation(device);
}
catch (Exception ex)
{
    HandleProcessingError(ex);
    throw;
}