When to use AttachedProperties in wpf

Question

Here are my doubts,

1. When to use AttachedProperties in wpf
2. Should I use AttachedProperties only with ContentControls (like Panels) where are there one or more children
3. What is the use of AttachedProperties
4. Can I use AttachedProperties for extending properties of a control, i.e., properties that don't exists but I would like to add to the control without modifying the object hierarchy of that control

P.S.: I have already read the MSDN link on AttachedProperties, still I would like to hear the best from the stackoverflow users

Thanks

Answer 1

You can take a look at these posts that are related:

What are the various uses of Attached Properties?

How exactly do Attached Properties work in WPF?

What's the difference between a dependency property and an attached property in WPF?