This sample is an updated version of Roget1911 from 2009! This version uses Xamarin.Forms to provide cross-platform shared user interface code.
The list screen is a native UITableView/Android ListView and the detail view uses the platform's native web view to display a Razor-generated Html.
The original blog post for the sample was in October 2009, based on Charles Petzold's Silverlight example from August 2009.