Example 1 Very Simple Example Demonstrating Setup, MvvM Binding and ViewModel Navigation

This example demonstrates creating the core of an App in a portable class library and then getting it working on the target platforms. We need to demonstrate binding a page to a ViewModel by echoing data typed into one element back to another element.

We also need to demonstrate clicking a button that fires a Command that will navigate from one page to another. This example comes in two forms: C# Pages and and XAML Pages. You can compare code between these two examples to see for yourself what changes.