Both RSS and Atom support protocol extensibility with additional namespace-qualified elements. An XML element not specifically defined in the RSS or Atom specifications can be present at the feed or item level as long as the namespace of that element does not match the root namespace of the enclosing feed. Element extensions can be added to various classes including:

• SyndicationFeed

• SyndicationItem

• SyndicationCategory

• SyndicationPerson

• SyndicationLink

The syndication object model makes this extensibility easier using SyndicationElementExtension, which can be placed in a SyndicationElementExtensionCollection.

System..::.Object
  System.ServiceModel.Syndication..::.SyndicationElementExtension

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5

Reference