Have you checked out Ammy[1]? It's been great to me so far.
It does hot code reloading during runtime, so no need for a crummy designer that crashes 30 times every day (the XAML designer isn't 100% WYSIWYG anyway).
Plus, IMO, the language is a lot more readable and enjoyable to author in than overly verbose XAML.
Plus, IMO, the language is a lot more readable and enjoyable to author in than overly verbose XAML.
[1]: http://www.ammyui.com/