XLabs/Xamarin-Forms-Labs — pull request #464 by Choran66 (2014-11-07 03:55:38+00:00)
Title: Modal support

Turns out the only way to have a fully awaitable dialog is to do some
fairly nasty stuff with the android message pump. (By the time I was done poor Xamarin was dead...oops) I didn't even look at
iOS.

Rather than chase that I've implemented a class that encapsulates a
pattern for using dialogs that is fairly clean.