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.

 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.