LocalQueryMethodImplementationTypeAttribute Attribute applied to static classes providing expression tree forms of query methods, mapping those to the corresponding methods for local query execution on the specified target class type.

 QueryDebugger (Infrastructure) Implement query debugger services.

 AsyncInfoObservable Provides a set of extension methods to expose observable sequences as Windows Runtime asynchronous actions and operations.

 DispatcherObservable Provides a set of extension methods for scheduling actions performed through observable sequences on UI dispatchers.

 Observable Provides a set of static methods for writing in-memory queries over observable sequences.

 ObservableEx Provides a set of static methods for writing in-memory queries over observable sequences.

 Qbservable Provides a set of static methods for writing queries over observable sequences, allowing translation to a target query language.

 QbservableEx Provides a set of static methods for writing queries over observable sequences, allowing translation to a target query language.

 WindowsObservable Provides a set of static methods for importing typed events from Windows Runtime APIs.

 IGroupedObservable`2 Represents an observable sequence of elements that have a common key.

 IQbservable Provides functionality to evaluate queries against a specific data source wherein the type of the data is not specified.

 IQbservable`1 Provides functionality to evaluate queries against a specific data source wherein the type of the data is known.

 IQbservableProvider Defines methods to create and execute queries that are described by an IQbservable object.