make class instance in xaml
--- https://subscription.packtpub.com/book/application_development/9781849686228/1/ch01lvl1sec09/creating-custom-type-instances-in-xaml <Window x:Class="CH01.CustomTypes.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:CH01.CustomTypes"> ... <Button FontSize="20"> <local:Book Name="Windows Internals" Author="Mark Russinovich" Price="40" YearPublished="2009" /> </Button>
