why is this:
<material:TabView TabPlacement="Start" ItemsSource="{Binding Path=Instance.Collection, Source={RelativeSource AncestorType={x:Type local:MainView}}}"/>
leading to this:
#if DEBUG && !DISABLE_XAML_GENERATED_BREAK_ON_UNHANDLED_EXCEPTION UnhandledException += (sender, e) => { if (global::System.Diagnostics.Debugger.IsAttached) global::System.Diagnostics.Debugger.Break(); }; #endif
with the awesome error massage:
Object reference not set to an instance of an object.
its working if the collection is empty (: