What is the difference between Width and ActualWidth in WPF?

Question

I am currently working with Panels in WPF, and I noticed that as regards the Width and Height properties, there are also two other pro

Answer 1

I find ActualWidth most useful when I want to bind the width or height of one element to another.

In this simple example I have two buttons arranged side by side and a comment underneath that is constrained to the width of the StackPanel containing the two buttons.