Event As ICommand Using Attached Property

namespace Attached.Behaviors.General
{
    using System.Windows.Input;
    using Windows.UI.Xaml;
    using Windows.UI.Xaml.Input;

    public class ElementTapGesture
    {
        public static readonly DependencyProperty TapItProperty =
            DependencyProperty.RegisterAttached(
            "TapCommand",
            typeof(ICommand),
            typeof(ElementTapGesture), // Changed from UIElement to this class, and now the code runs fine
            new PropertyMetadata(null, TapChanged));

        public static void SetTapCommand(DependencyObject element, ICommand value)
        {
            element.SetValue(TapItProperty, value);
        }

        public static ICommand GetTapCommand(DependencyObject element)
        {
            return (ICommand)element.GetValue(TapItProperty);
        }

        private static void TapChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var element = d as UIElement;
            if (element == null)
            {
                return;
            }

            if (e.NewValue != null)
            {
                element.Tapped += OnElementTap;
            }
            else
            {
                element.Tapped -= OnElementTap;
            }
        }

        private static void OnElementTap(object sender, TappedRoutedEventArgs e)
        {
            ICommand command = GetTapCommand(sender as DependencyObject);
            if (command != null)
            {
                if (command.CanExecute(e))
                {
                    command.Execute(e);
                }
            }
        }
    }
}