Can't use on Windows Phone 8.1 (non-silverlight) due to system libraries not matching .
For example IValueConverter namespace is different between
wpa81: Windows.UI.Xaml.Data.IValueConverter (non-silverlight)
wp80 : System.Windows.Data.IValueConverter (silverlight)
Can't use on Windows Phone 8.1 (non-silverlight) due to system libraries not matching . For example IValueConverter namespace is different between wpa81: Windows.UI.Xaml.Data.IValueConverter (non-silverlight) wp80 : System.Windows.Data.IValueConverter (silverlight)