| EffectiveViewportChangedEventArgs | Provides data for the EffectiveViewportChanged event. |
| Layoutable | Implements layout-related functionality for a control. |
| LayoutExtensions | Extension methods for layout types. |
| LayoutHelper | Provides helper methods needed for layout. |
| LayoutInformation | Provides access to layout information of a control. |
| LayoutManager | Manages measuring and arranging of controls. |
| IEmbeddedLayoutRoot | A special layout root with enforced size for Arrange pass |
| ILayoutManager | Manages measuring and arranging of controls. |
| ILayoutRoot | Defines the root of a layoutable tree. |
| HorizontalAlignment | Defines how a control aligns itself horizontally in its parent control. |
| Orientation | Defines vertical or horizontal orientation. |
| VerticalAlignment | Defines how a control aligns itself vertically in its parent control. |