Hosting WPF controls in a WinForms application

Although I am not really using WinForms a lot, I know that there are situations when a WPF control needs to be somehow plugged in to a WinForms project, especially when you want to bring a custom UI design to an existing app.  And although it seems to be a quite interesting task to do, in fact it is quite simple. To get started, I created a WPF User Control Library project in Visual Studio that