WCF Data Services (formerly known as "ADO.NET Data Services") is a component of the .NET Framework that enables you to create services that use the Open Data Protocol (OData) to
expose and consume data over the Web or intranet by using the semantics of representational state transfer (REST). OData exposes data as resources that are addressable by URIs. Data is accessed and changed by using standard HTTP verbs of GET, PUT, POST, and
DELETE. OData uses the entity-relationship conventions of the
Entity Data Model to expose resources as sets of entities that are related by associations.
WCF Data Services uses the OData protocol for addressing and updating resources. In this way, you can access these services from any client that supports OData. OData enables you to request and write data to resources by using well-known
WCF Data Services can expose data that originates from various sources as OData feeds. Visual Studio tools make it easier for you to create an OData-based service by using an ADO.NET Entity Framework data model. You can also create OData
feeds based on common language runtime (CLR) classes and even late-bound or un-typed data.
WCF Data Services also provides client libraries to access OData feeds from applications created in Visual Studio that target the following platforms:
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