Read original post at Adam Grocholski's Blog
Now that your app can connect to a network and manage its network usage, it’s time to start working with data. Two of the most common data formats in use on the Internet today are Extensible Markup Language (XML) and JavaScript Object Notation (JSON). Website that update their content frequently, such as blogs, often provide an XML feed so that apps can keep up with the content changes. This section will show you how to parse an XML document and use its data in your apps.
The first thing you’ll need to do is decide on an XML feed you want to use in your app. For this section will use a feed from StackOverflow.com that focuses on Windows 8. The feed is available at http://stackoverflow.com/feeds/tag/windows-phone-8.