How to: Access Binary Data as a Stream (WCF Data Services/Silverlight)

Silverlight

Open Data Protocol (OData) enables a data service to make binary data available outside of the feed itself. This binary data, called a media resource, is separate from but related to an entity, which is called a media link entry. For more information, see Working with Binary Data (WCF Data Services).

The procedure and examples in this topic show you how to add a reference to the Northwind streaming sample data service and call the GetReadStream(Object) method to retrieve binary data as a stream from an OData service.

The streaming data service accessed by the application is a special version of the Northwind sample data service that has been modified to support streaming. For more information see Streaming Provider (WCF Data Services). The Northwind streaming data service sample can be downloaded from the MSDN Code Gallery Web site.

Check the following link:
http://msdn.microsoft.com/en-us/library/ff602281%28v=VS.95%29.aspx