https://learn.microsoft.com/en-us/previous-versions/xamarin/xamarin-forms/release-notes/4.0/4.0.0-pre9
Xamarin.Forms 4.0.0.346134-pre9 (4.0.0 Pre Release 9) Release Notes - Xamarin | Microsoft Learn
Release notes detailing new features, improvements, and issues fixed in Xamarin.Forms 4.0.0.346134-pre9 (4.0.0 Pre Release 9)
xamarin forms