The following is an excerpt from Chapter 6 of my book, Building Windows 8 Apps with C# and XAML.The Open Data Procotol (OData) is a web protocol used for querying and updating data. It is a REST-based API built on top of Atom that uses JSON or XML for transporting information. Windows 8 applications have native support for OData clients once you download and install the client from here
To access OData services, you simply add a service reference the same way you would for a SOAP-based web service. A popular OData service to use for demonstrations is the Netflix movie catalog. You can browse the service directly by typing http://odata.netflix.com/catalog/ into your browser. In most browsers you should see an XML document that contains various tags for collections you may browse. For example, the collection referred to as Titles indicates you can browse all titles using the URL, http://odata.netflix.com/catalog/Titles.
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