using Microsoft.Windows.Design; namespace Xamarin.Forms.Xaml.Design { class AttributeTableBuilder : Microsoft.Windows.Design.Metadata.AttributeTableBuilder { public AttributeTableBuilder() { // Turn off validation of values, which doesn't work for OnPlatform/OnIdiom AddCustomAttributes(typeof (ArrayExtension).Assembly, new XmlnsSupportsValidationAttribute("http://xamarin.com/schemas/2014/forms", false)); } } }