Windows Presentation Foundation 4.5 Cookbook

Creating an attached property

An attached property can be used to somehow "enhance" or extend another object. In the case outlined in the previous recipe, Using an attached property, an element was placed at exact coordinates within a Canvas using the attached Canvas.Left and Canvas.Top properties. An attached property is a powerful tool for extending the behavior of any object without the need to inherit from the type of the object. In this task, we'll see this in action.

Getting ready

Make sure Visual Studio is up and running.

How to do it...

We'll create an attached property that would rotate any element it's attached to:

1. Create a new WPF Application named CH01.CustomAttached.
2. Open MainWindow.xaml. Add some elements in a Canvas (replace the default ...