xamarin UWP设置HUD加载功能

using BS.Dependencies;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Xamarin.Forms;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Media;
using Windows.UI;
using Windows.UI.Xaml;

[assembly: Dependency(typeof(BS.UWP.Dependencies.HUDUWP))]
namespace BS.UWP.Dependencies
{
    public class HUDUWP : IHUD
    {
        private Windows.UI.Xaml.Controls.Grid Container = new Windows.UI.Xaml.Controls.Grid() {
            Background = new SolidColorBrush(Colors.Black),
            CornerRadius = new CornerRadius(10),
            Padding = new Windows.UI.Xaml.Thickness(10),
            HorizontalAlignment = HorizontalAlignment.Center,
            VerticalAlignment = VerticalAlignment.Center,
        };

        private Popup Popup = null;

        public HUDUWP()
        {
            this.Popup = new Popup()
            {
                Child = new Border()
                {
                    Width = Window.Current.Bounds.Width,
                    Height = Window.Current.Bounds.Height,
                    Background = new SolidColorBrush(Colors.Gray),
                    Opacity = 0.6,
                    HorizontalAlignment = HorizontalAlignment.Center,
                    VerticalAlignment = VerticalAlignment.Center,
                    Child = this.Container,
                }
            };
        }


        public void Show()
        {
            this.Show("Hello World", 60000);
        }

        public void Show(string message)
        {
            this.Show(message, 60000);
        }
        public void Show(string message, int delay = 1000)
        {
            this.Popup.IsOpen = true;
            this.Container.Children.Clear();
            
            this.Container.Children.Add(new TextBlock()
            {
                Text = message,
                Foreground = new SolidColorBrush(Colors.White),
                FontSize = 20
            });

        }

        public void Dismiss()
        {
            this.Popup.IsOpen = false;
        }
    }
}