Silverlight 5 WinRT

public sealed class DataServiceEntityAttribute  
: Attribute, _Attribute  

public sealed class DataServiceKeyAttribute  
: Attribute, _Attribute  
public ReadOnlyCollection`1<String> KeyNames { get; }  

public sealed class EntityPropertyMappingAttribute  
: Attribute, _Attribute  
public Boolean KeepInContent { get; }  
public String SourcePath { get; }  
public String TargetNamespacePrefix { get; }  
public String TargetNamespaceUri { get; }  
public String TargetPath { get; }  
public SyndicationItemProperty TargetSyndicationItem { get; }  
public SyndicationTextContentKind TargetTextContentKind { get; }  

public sealed class EntitySetAttribute  
: Attribute, _Attribute  
public String EntitySet { get; }  

public sealed class HasStreamAttribute  
: Attribute, _Attribute  

public sealed enum SyndicationItemProperty  
: IComparable, IFormattable, IConvertible  
{ CustomProperty, AuthorEmail, AuthorName, AuthorUri, ContributorEmail, ContributorName, ContributorUri, Updated, Published, Rights, Summary, Title }  

public sealed enum SyndicationTextContentKind  
: IComparable, IFormattable, IConvertible  
{ Plaintext, Html, Xhtml }