Roberto Sonnino has a tutorial explaining how to develop the Turnstile animation as featured in the
Windows Phone 7 UI, along with an easy-to-use
ItemsControl that applies the effect to its items.
Source: The Code Project
This article is divided in two parts. In the first part, we'll deconstruct the effect in the simplest possible way. To do that; we'll reproduce the effect in a "controlled scenario", in which we build all the elements knowing their positions. In the second part, a refactored and reusable version of this effect will be presented in the form of an ItemsControl that can use any panel for positioning the elements. In one sentence, "Make it work, then make it right".