1. .NET and .NET Core
8. WPF Hierarchy
Pan Wuming
2017

2. WPF Class Hierarchy

3. Unmanaged component The milcore is an unmanaged component
This is to enable tight integration with DirectX

4. DispatcherObject
WPF is based on a messaging system implemented by the dispatcher
The dispatcher is a basic message dispatching system, with multiple prioritized queues.
Examples of messages include raw input notifications (mouse moved), framework functions (layout), or user commands (execute this method).
WPF’s threading model was kept in sync with the model of single threaded execution with thread affinity (STA).
DispatcherObject is simply an object that’s linked to a dispatcher—in other words, an object that’s bound to the dispatcher’s thread.

8. DependencyObject
WPF elements are built on the principle of composition and component reuse.
System driven by properties:
The property system is truly a "dependency" property system in that it tracks dependencies between property expressions and automatically revalidates property values when dependencies change.
Two way binding and change notification
Property expression: free of hard code
Sparse storage of property values
Attached properties: Additional data on child elements

12. In WPF, properties are typically exposed as common language runtime (CLR) properties.
At a basic level, you could interact with these properties directly and never know that they are implemented as a dependency property.

13. Visual
Visual is the point of connection between the managed API and the unmanaged milcore
The entire tree of visuals and drawing instructions is cached
WPF allows each component to paint over the previous component's display.

14. UIElement Core subsystems: Layout, Input, and Events.
Two phase layout model: Measure and Arrange.
Events routing: previewing input events tunnel and bubbling input events
CommandBindings

15. Example: Mouse Events

18. FrameworkElement Data binding Styles
A lightweight form of data binding
Bind a set of properties from a shared definition to one or more instances of an element

20. Control Templating Data model (properties)
Interaction model (commands and events)
Display model (templates)