Programmer Payback

Should I add a cancellation token parameter?

Assuming you are returning a Task rather than IAsyncAction or IAsyncOperation (more on these later). Assume the answer is always yes. Async API take time to run. Maybe you already know that an async API will never take more than a few milliseconds, but this is an implementation detail that should never be imposed by the method signature.

How do I handle transactions?

If your async method throws an OperationCanceledException always be sure that your app’s state is not left broken. Either don’t throw at all and force the method to complete entirely or roll back your changes. A good example of this would be if you are writing 2 files to disk that both need to be completely written.

How to build and consume?

Let’s take a look how to accomplish this in our own custom events. Event handlers: We will start by examining what the event handler will look like.

Aren’t there already some great open source Google Analytics libraries out there for Win8 and WP developers?

The short answer: Yes, but they don’t work with the latest version of Google Analytics.

What additional features does the new Google Analytics service include?

The ability to track and filter by app name and version. This is extremely powerful and allows you to: Create one property for all your apps (Windows 8, Windows Phone, Android, iOS, …etc) and use filters to view them separately. On the flip side, it also allows you to compare all apps against each other.